OP 2 Ruthven, A.G., 1913.
On Ameiva bifrontata Cope and Ameiva divisus (Fischer). 3 pp. $0.50
OP 8 Ruthven, A.G. and H.T. Gaige, 1915.
The reptiles and amphibians collected in northeastern Nevada by the Walker-Newcomb Expedition of the University of Michigan. 33 pp., 5 plates, 4 tables. $2.65
OP 9 Thompson, C., 1915.
Notes on the habits of Rana areolata Baird and Girard. 13 pp., 3 plates, 1 table. $1.10
OP 10 Ruthven, A.G. and H.T. Gaige, 1915.
The breeding habits of Prostherapis subpunctatus Cope. 7 pp., 1 plate. $0.70
OP 11 Ruthven, A.G., 1915.
The breeding habits of Hylodes cruentus Peters. 7 pp., 1 plate. $0.70
OP 12 Ruthven, A.G. and Thompson, C., 1915.
On the occurrence of Clemmys insculpta (LeConte) in Michigan. 2 pp. $0.50
OP 14 Ruthven, A.G., 1915.
Observations on the habits, eggs, and young of Hyla fuhrmanni Peracca. 5 pp., 1 plate. $0.60
OP 16 Ruthven, A.G., 1915.
Description of a new subspecies of Cnemidophorus lemniscatus Laurenti. 7 pp., 1 plate. $0.70
OP 17 Gaige, H.T., 1915.
The amphibians and reptiles collected by the Bryant Walker Expedition to Schoolcraft County, Michigan. 5 pp. $0.60
OP 18 Thompson, C., 1915.
The reptiles and amphibians of Manistee County, Michigan. 6 pp. $0.60
OP 19 Ruthven, A.G., 1915.
Description of a new genus and species of lizard of the family Gekkonidae. 3 pp. $0.50
OP 20 Ruthven, A.G., 1915.
Description of a new tailless amphibian of the family Dendrobatidae. 3 pp. $0.50
OP 21 Ruthven, A.G., 1916.
A new genus and species of lizard from Colombia, with remarks on the genus Pseudogonatodes. 3 pp. $0.50
OP 22 Ruthven, A.G., 1916.
Description of a new genus and species of lizard from British Guiana. 4 pp. $0.50
OP 28 Ruthven, A.G., 1916.
Description of a new species of Atelopus from the Santa Marta Mountains, Colombia. 4 pp., 1 plate. $0.50
OP 30 Ruthven, A.G., 1916.
A new species of Paludicola from Colombia. 3 pp. $0.50
OP 32 Ruthven, A.G., 1916.
Three new species of Anolis from the Santa Marta Mountains, Colombia. 11 pp., 3 plates. $1.00
OP 33 Ruthven, A.G., 1916.
A new genus and species of amphibian of the family Cystignathidae. 5 pp., 1 plate. $0.60
OP 34 Ruthven, A.G., 1917.
Description of a new species of Eleutherodactylus from Colombia. 5 pp., 1 plate, 1 figure. $0.60
OP 39 Ruthven, A.G., 1917.
Two new species of Eleutherodactylus from Colombia. 9 pp., 1 plate. $0.90
OP 40 Gaige, H.T., 1917.
Description of a new salamander from Washington. 4 pp., 1 plate. $0.50
OP 43 Ruthven, A.G., 1917.
A new amphibian of the genus Eleutherodactylus from the Santa Marta Mountains, Colombia. 4 pp., 1 plate. OOP
OP 44 Barbour, T., 1917.
A most regrettable tangle of names. 9 pp. OOP
OP 47 Ruthven, A.G., 1917.
On the occurrence of Bufo fowleri in Michigan. 6 pp., 1 plate. $0.60
OP 62 Case, E.C., 1918.
A mounted skeleton of Edaphosaurus cruciger Cope, in the geological collection of the University of Michigan. 8 pp., 2 plates. $0.80
OP 66 Ruthven, A.G., 1919.
Contributions to the herpetology of Iowa, III. 3 pp. $0.50
OP 69 Ruthven, A.G., 1919.
The amphibians of the University of Michigan-Walker expedition to British Guiana. 17 pp., 3 plates. $1.35
OP 70 Blanchard, F.N., 1919.
Two new snakes of the genus Lampropeltis. 12 pp., 1 plate, 2 foldout tables. $1.00
OP 76 Barbour, T., 1920.
An undescribed Microhyla. 4 pp. $0.50
OP 81 Blanchard, F.N., 1920.
Three new snakes of the genus Lampropeltis. 12 pp., 1 plate, 2 foldout tables. OOP
OP 82 Case, E.C., 1920.
On a very perfect thoracic shield of a large labyrinthodont in the geological collections of the University of Michigan. 5 pp., 1 plate. $0.50
OP 84 Gaige, H.T., 1920.
Observations upon the habits of Ascaphus truei Stejneger. 11 pp., 1 plate. $1.00
OP 87 Blanchard, F.N., 1920.
A synopsis of the king snakes: genus Lampropeltis Fitzinger. 7 pp., 1 foldout table. $0.70
OP 103 Ruthven, A.G., 1921.
Description of an apparently new lizard from Colombia. 4 pp. $0.50
OP 107 Gaige, H.T., 1922.
A new Gastrotheca from Venezuela. 3 pp. $0.50
OP 117 Blanchard, F.N., 1922.
The amphibians and reptiles of western Tennessee. 18 pp., 10 tables. $1.45
OP 122 Ruthven, A.G., 1922.
A new species of Amphisbaena from British Guiana. 2 pp. $0.50
OP 126 Blanchard, F.N., 1922.
Discovery of the eggs of the four-toed salamander in Michigan. 3 pp. $0.50
OP 129 Barbour, T., 1923.
Notes on reptiles and amphibians from Panama. 16 pp. $1.30
OP 131 Barbour, T., 1923.
The crocodile in Florida. 6 pp. $0.60
OP 132 Barbour, T., 1923.
West Indian investigations of 1922. 9 pp. $0.90
OP 136 Ruthven, A.G. and H.T. Gaige, 1923.
Description of a new species of Pipa from Venezuela. 2 pp. $0.50
OP 139 Ortenburger, A.I., 1923.
A note on the genera Coluber and Masticophis, and a description of a new species of Masticophis. 14 pp., 3 plates, 1 table. $1.10
OP 140 Blanchard, F.N., 1923.
A new North American snake of the genus Natrix. 7 pp., 1 map, 1 table. $0.70
OP 142 Blanchard, F.N., 1923.
Comments on ring-neck snakes (Genus Diadophus), with diagnoses of new forms. 9 pp. $0.90
OP 143 Ruthven, A.G., 1923.
The reptiles of the Dutch Leeward Islands. 10 pp. $0.90
OP 147 Ruthven, A.G. and Gaige, H.T., 1924.
A new Leposoma from Panama. 3 pp. $0.50
OP 149 Ruthven, A.G., 1924.
Description of an Ameiva from Testigos Island, Venezuela. 3 pp. $0.50
OP 150 Blanchard, F.N., 1924.
A new snake of the genus Arizona. 5 pp., 2 tables. $0.60
OP 151 Dunn, E.R., 1924.
Some Panamanian frogs. 16 pp., 2 plates, 1 figure. $1.30
OP 153 Ruthven, A.G., 1924.
Description of a new lizard of the genus Alopoglossus. 3 pp. $0.50
OP 155 Ruthven, A.G., 1924.
The subspecies of Ameiva bifrontata. 6 pp. $0.60
OP 172 Jones, J.P., 1926.
The proper name for Sceloporus consobrinus Baird and Girard. 3 pp. $0.50
OP 176 Gaige, H.T., 1926.
A new frog from British Guiana. 5 pp., 1 plate. $0.60
OP 177 Ruthven, A.G., 1926.
A new species of Anadia from the Santa Marta Mountains, Colombia. 3 pp. $0.50
OP 178 Ruthven, A.G., 1926.
The status of Phyllodactylus spatulatus Cope. 2 pp. $0.50
OP 179 Ruthven, A.G., 1926.
Notes on Utah reptiles. 4 pp. $0.50
OP 186 Jones, J.P., 1927.
Descriptions of two new Scelopori. 7 pp. $0.70
OP 187 Parker, H.W., 1927.
The brevicipitid frogs allied to the genus Gastrophryne. 8 pp., 1 plate. $0.80
OP 188 Ruthven, A.G., 1927.
Description of an apparently new species of Apostolepis from Bolivia. 2 pp. $0.50
OP 189 Burt, C.E., 1927.
An annotated list of the amphibians and reptiles of Riley County, Kansas. 9 pp. OOP
OP 191 Ruthven, A.G., 1928.
Notes on the genus Lepidoblepharis (Peracca), with description of a new subspecies. 3 pp. $0.50
OP 195 Stull, O.G., 1928.
A revision of the genus Tropidophis. 52 pp., 3 plates. OOP
OP 196 Burt, C.E., 1928.
The synonymy, variation, and distribution of the collared lizard, Crotaphytus collaris (Say). 26 pp., 7 plates, 1 map, 2 tables. OOP
OP 201 Burt, C.E., 1929.
The synonymy, variation, and distribution of the Sonoran skink, Eumeces obsoletus (Baird and Girard). 15 pp., 3 plates, 1 map, 1 table. $1.20
OP 205 Stull, O.G., 1929.
The description of a new subspecies of Pituophis melanoleucus from Louisiana. 3 pp. $0.50
OP 206 Ruthven, A.G., 1929.
Description of a new species of Kentropyx from Brazil. 3 pp. $0.50
OP 207 Gaige, H.T., 1929.
Three new tree-frogs from Panama and Bolivia. 6 pp. $0.60
OP 211 Werner, F., 1930.
Contribution to the knowledge of the reptiles and amphibians of Greece, especially the Aegean Islands. 46 pp., 6 plates. $3.70
OP 236 Stuart, L.C., 1932.
Studies on neotropical Colubrinae, I: The taxonomic status of the genus Drymobius Fitzinger. 26 pp., 5 plates, 2 figures. $2.10
OP 237 Krull, W.H. and H.F. Price, 1932.
Studies on the life history of Diplodiscus temperatus Stafford from the frog. 41 pp., 2 plates. $3.30
OP 241 Ruthven, A.G. and L.C. Stuart, 1932.
Notes on the period of post-depositional development in several common lizards. 3 pp. $0.50
OP 243 Ruthven, A.G., 1932.
Notes on the amphibians and reptiles of Utah. 4 pp. $0.50
OP 244 Stuart, L.C., 1932.
The lizards of the Middle Pahvant Valley, Utah; materials for a study of Saurian distribution. 39 pp., 3 plates, 2 maps, 6 tables. $3.10
OP 246 Mosauer, W., 1932.
The amphibians and reptiles of the Guadalupe Mountains of New Mexico and Texas. 19 pp., 1 plate. $1.50
OP 250 Stull, O.G., 1932.
An annotated list of the forms of the genus Pituophis. 5 pp. $0.60
OP 251 Dunn, E.R., 1932.
The status of the snake genus Rhadinaea Cope. 2 pp. $0.50
OP 254 Stuart, L.C., 1933.
Studies on neotropical Colubrinae, II: Some new species and subspecies of Eudryas Fitzinger, with an annotated list of the forms of Eudryas boddaertii (Sentzen). 10 pp., 1 map. $0.90
OP 257 Ruthven, A.G., 1933.
Description of a new Anolis from Yucatan. 2 pp. $0.50
OP 259 Allen, M.J., 1933.
Report on a collection of amphibians and reptiles from Sonora, Mexico, with the description of a new lizard. 15 pp. $1.20
OP 260 Ruthven, A.G. and H.T. Gaige, 1933.
A new skink from Mexico. 3 pp. $0.50
OP 263 Gaige, H.T., 1933.
A new Gastrotheca from Columbia. 3 pp. $0.50
OP 267 Stull, O.G., 1933.
Two new subspecies of the family Boidae. 4 pp. $0.50
OP 272 Brandt, B.B. and C.F. Walker, 1933.
A new species of Pseudacris from the southeastern United States. 9 pp., 1 plate. $0.90
OP 277 Hartweg, N., 1934.
Description of a new kinosternid from Yucatan. 2 pp. $0.50
OP 281 Gaige, H.T. and L.C. Stuart, 1934.
A new Hyla from Guatemala. 3 pp. $0.50
OP 283 Gloyd, H.K. and R. Conant, 1934.
The broad-banded copperhead: a new subspecies of Agkistrodon mokasen. 7 pp., 1 plate. $0.70
OP 284 Stuart, L.C., 1934.
Studies on neotropical Colubrinae., IV: An apparently new species of Coluber from Guatemala. 4 pp. $0.50
OP 287 Gloyd, H.K. and R. Conant, 1934.
The taxonomic status, range, and natural history of Schott's racer. 23 pp., 3 plates, 1 map, 1 table. $1.80
OP 289 Campbell, B., 1934.
Report on a collection of reptiles and amphibians made in Arizona during the summer of 1933. 10 pp. $0.90
OP 290 Clanton, W., 1934.
An unusual situation in the salamander Ambystoma jeffersonianum (Green). 15 pp., 1 plate, 1 figure, 1 table. $1.20
OP 292 Stuart, L.C., 1934.
A contribution to the knowledge of the herpetological fauna of El Peten, Guatemala. 18 pp., 1 figure. $1.45
OP 307 Ruthven, A.G. and H.T. Gaige, 1935.
Observations on Typhlops from Puerto Rico and some of the adjacent islands. 12 pp., 2 figures. $1.00
OP 309 Stuart, L.C., 1935.
Studies on neotropical Colubrinae, V: A new snake of the genus Lampropeltis from Yucatan. 6 pp., 2 tables. $0.60
OP 310 Stuart, L.C., 1935.
A new Anolis from northern Central America. 4 pp. $0.50
OP 313 Dunn, E.R. and L.C. Stuart, 1935.
A new race of Leptodeira from northern Central America. 3 pp. $0.50
OP 322 Gloyd, H.K., 1935.
The subspecies of Sistrurus miliarius. 7 pp. $0.70
OP 323 Stuart, L.C., 1935.
The king snake of the Tres Marias Islands. 3 pp. $0.50
OP 324 Burt, C.E., 1935.
A new lizard from the Dutch Leeward Islands (Cnemidophorus murinus ruthveni). 3 pp. $0.50
OP 325 Gloyd, H.K., 1936.
A Mexican subspecies of Crotalus molossus Baird and Girard. 5 pp. $0.60
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OP 327 Goff, C.C., 1936.
Distribution and variation of a new subspecies of water snake, Natrix cyclopion floridana, with a discussion of its relationships. 11 pp., 1 plate, 1 table. $1.00
OP 328 Conant, R. and R.M. Bailey, 1936.
Some herpetological records from Monmouth and Ocean counties, New Jersey. 10 pp. $0.90
OP 329 Mosauer, W., 1936.
The reptilian fauna of sand dune areas of the Vizcaino Desert and of northwestern lower California. 25 pp., 2 plates, 1 table. $2.00
OP 330 Ruthven, A.G., 1936.
Leptodeira bakeri, new species. 2 pp. $0.50
OP 337 Gloyd, H.K., 1936.
The subspecies of Crotalus lepidus. 7 pp., 1 plate. OOP
OP 346 Conant, R. and W.M. Clay, 1937.
A new subspecies of water snake from islands in Lake Erie. 15 pp., 3 plates, 1 map, 2 tables. $1.20
OP 348 Carr, A.F., Jr., 1937.
A new turtle from Florida, with notes on Pseudemys floridana mobiliensis (Holbrook). 11 pp., 2 plates. $1.00
OP 353 Dunn, E.R., 1937.
Notes on tropical Lampropeltis. 11 pp., 2 tables. $1.00
OP 356 Hartweg, N. and J.A. Oliver, 1937.
A contribution to the herpetology of the Isthmus of Tehuantepec, I: The Scelopori of the Pacific slope. 9 pp., 4 tables. $0.90
OP 357 Gaige, H.T., N. Hartweg and L.C. Stuart, 1937.
Notes on a collection of amphibians and reptiles from eastern Nicaragua. 18 pp., 1 map. $1.45
OP 358 Smith, H.M., 1937.
A synopsis of the variabilis group of the lizard genus Sceloporus, with descriptions of new subspecies. 14 pp. $1.10
OP 359 Hartweg, N. and J. Oliver, 1937.
A contribution to the herpetology of the Isthmus of Tehuantepec, II: The teiids of the Pacific slope. 8 pp., 2 figures, 2 tables. $0.80
OP 360 Oliver, J.A., 1937.
Notes on a collection of amphibians and reptiles from the state of Colima, Mexico. 30 pp., 1 plate, 1 figure, 1 map, 1 table. $2.40
OP 361 Smith, H.M., 1937.
A synopsis of the scalaris group of the lizard genus Sceloporus. 8 pp. $0.80
OP 362 Bailey, J.R., 1937.
New forms of Coniophanes Hallowell, and the status of Dromicus clavatus Peters. 6 pp. $0.60
OP 363 Dunkle, D.H. and H.M. Smith, 1937.
Notes on some Mexican ophidians. 15 pp. $1.20
OP 364 Bailey, J.R., 1937.
Notes on plethodont salamanders of the southeastern United States. 10 pp. $0.90
OP 370 Hershkovitz, P., 1938.
A new caecilian from Ecuador. 3 pp., 1 figure. $0.50
OP 371 Hartweg, N., 1938.
Kinosternon flavescens stejnegeri, a new turtle from northern Mexico. 5 pp., 1 table. $0.60
OP 372 Walker, C.F., 1938.
The structure and systematic relationships of the genus Rhinophrynus. 11 pp., 3 figures. $1.00
OP 387 Smith, H.M., 1938.
Remarks on the status of the subspecies of Sceloporus undulatus, with descriptions of new species and subspecies of the undulatus group. 17 pp., 2 tables (1 foldout). $1.35
OP 388 Smith, H.M., 1938.
Notes on reptiles and amphibians from Yucatan and Campeche, Mexico. 24 pp., 1 plate, 1 table. $1.90
OP 390 Hartweg, N. and J.A. Oliver, 1938.
A contribution to the herpetology of the Isthmus of Tehuantepec, III: Three new snakes from the Pacific slope. 9 pp., 1 plate. $0.90
OP 397 Hartweg, N., 1939.
A new American Pseudemys. 4 pp. $0.50
OP 409 Stuart, L.C., 1939.
A description of a new Gymnophthalmus from Guatemala, with notes on other members of the genus. 11 pp., 1 plate. $1.00
OP 412 Bailey, J.R., 1940.
The Mexican snakes of the genus Rhadinaea. 21 pp., 2 plates, 4 tables. $1.70
OP 421 Stuart, L.C., 1940.
Notes on the "Lampropholis" group of Middle American Lygosoma (Scincidae) with descriptions of two new forms. 16 pp., 1 figure. $1.30
OP 437 Hartweg, N., 1941.
Notes on the genus Plectrohyla, with descriptions of new species. 11 pp., 1 plate, 1 table. $1.00
OP 438 Hartweg, N. and G. Orton, 1941.
Notes on tadpoles of the genus Plectrohyla. 6 pp., 2 figures. $0.60
OP 442 Stuart, L.C. and J.R. Bailey, 1941.
Three new species of the genus Rhadinaea from Guatemala. 11 pp., 1 figure. $1.00
OP 444 Woodall, H.T., 1941.
A new Mexican salamander of the genus Oedipus. 4 pp., 1 table. $0.50
OP 451 Bishop, S.C., 1941.
Notes on salamanders with descriptions of several new forms. 25 pp., 2 plates, 2 tables. $2.00
OP 452 Stuart, L.C., 1941.
Some new snakes from Guatemala. 7 pp. $0.70
OP 455 Stuart, L.C., 1942.
Description of two new species of Plectrohyla Brocchi with comments on several forms of tadpoles. 14 pp., 4 figures, 2 tables. $1.10
OP 460 Myers, G.S., 1942.
The black toad of Deep Springs Valley, Inyo County, California. 19 pp., 3 plates. $1.50
OP 462 Oliver, J.A., 1942.
A check list of the snakes of the genus Leptophis, with descriptions of new forms. 19 pp. $1.50
OP 464 Stuart, L.C., 1942.
Comments on several species of Anolis from Guatemala, with descriptions of three new forms. 10 pp. $0.90
OP 470 Grobman, A.B., 1943.
Notes on salamanders with the description of a new species of Cryptobranchus. 13 pp., 1 plate, 1 figure, 1 map. $1.10
OP 471 Stuart, L.C., 1943.
Comments on the herpetofauna of the Sierra de los Cuchumatanes of Guatemala. 29 pp., 1 plate, 7 figures, 1 map, 4 tables. $2.30
OP 472 Orton, G., 1943.
The tadpole of Rhinophrynus dorsalis. 9 pp., 1 plate. $0.90
OP 486 Hartweg, N., 1944.
Remarks on some Mexican snakes of the genus Tantilla. 9 pp., 2 tables. $0.90
OP 492 Bailey, J.R., 1946.
Leptotyphlops anthracinus, a new blind snake from eastern Ecuador. 5 pp., 2 tables. $0.60
OP 493 Dunn, E.R., 1946.
Atractus sanctaemartae, a new species of snake from the Sierra Nevada de Santa Marta, Colombia. 6 pp. $0.60
OP 497 Hartweg, N. and J.A. Tihen, 1946.
Lizards of the genus Gerrhonotus from Chiapas, Mexico. 16 pp., 4 tables. $1.30
OP 508 Peters, J.A., 1948.
A new snake of the genus Typhlops from the Solomon Islands. 5 pp., 1 plate. $0.60
OP 510 Conant, R. and C.J. Goin, 1948.
A new subspecies of soft-shelled turtle from the central United States, with comments on the application of the name Amyda. 23 pp., 2 plates, 1 map. $1.80
OP 537 Peters, J.A., 1951.
Studies on the lizard Holbrookia texana (Troschel) with descriptions of two new subspecies. 20 pp., 1 map, 2 tables. $1.60
OP 539 Peters, J.A., 1952.
Catalogue of type specimens in the herpetological collections of the University of Michigan Museum of Zoology. 55 pp. $4.40
OP 540 Dowling, H.G., 1952.
A taxonomic study of the ratsnakes, genus Elaphe Fitzinger, II: The subspecies of Elaphe flavirufa (Cope). 15 pp., 1 plate, 2 figures, 1 map, 1 table. $1.20
OP 541 Dowling, H.G., 1952.
A taxonomic study of the ratsnakes, genus Elaphe Fitzinger, IV: A check list of the American forms. 12 pp. $1.00
OP 543 Martin, P.S., 1952.
A new subspecies of the iguanid lizard Sceloporus serrifer from Tamaulipas, Mexico. 7 pp., 1 table. $0.70
OP 546 Cagle, F.R., 1953.
Two new subspecies of Graptemys pseudogeographica. 17 pp., 3 figures. $1.35
OP 548 Mosimann, J.E. and G.B. Rabb, 1953.
A new subspecies of the turtle Geoemyda rubida (Cope) from western Mexico. 9 pp., 1 plate, 1 figure, 1 map, 1 table. $0.90
OP 554 Peters, J.A., 1954.
The amphibians and reptiles of the coast and coastal Sierra of Michoacán, Mexico. 37 pp. $3.00
OP 555 de Carvalho, A.L., 1954.
A preliminary synopsis of the genera of American mycrohylid frogs. 21 pp., 1 plate, 8 figures. $1.70
OP 560 Duellman, W.E., 1954.
The amphibians and reptiles of Jorullo Volcano, Michoacán, Mexico. 27 pp., 2 plates, 1 figure, 1 map, 2 tables. $2.20
OP 561 Walker, C.F. and F.H. Test, 1955.
New Venezuelan frogs of the genus Eleutherodactylus. 10 pp. $1.00
OP 563 Rabb, G.B. and J.E. Mosimann, 1955.
The tadpole of Hyla robertsorum, with comments on the affinities of the species. 9 pp., 3 figures, 1 table. $1.00
OP 564 Walker, C.F., 1955.
Two new lizards of the genus Lepidophyma from Tamaulipas. 10 pp. $1.00
OP 567 Walker, C.F., 1955.
A new salamander of the genus Pseudoeurycea from Tamaulipas. 9 pp., 1 plate. $0.90
OP 569 Duellman, W.E., 1955.
Notes on amphibians and reptiles from Arizona. 15 pp., 1 plate, 1 table. $1.20
OP 570 Duellman, W.E. and J.E. Werler, 1955.
Variation and relationships of the colubrid snake Leptodeira frenata. 13 pp., 2 plates, 1 map, 1 table. $1.10
OP 571 Bailey, J.R., 1955.
The snakes of the genus Chironius in southeastern South America. 21 pp., 1 figure, 3 tables. $1.70
OP 574 Duellman, W.E., 1955.
A new whiptail lizard, genus Cnemidiphorus, from Mexico. 7 pp., 2 figures. $0.80
OP 575 Martof, B., 1956.
Three new subspecies of Leurognathus marmorata from the southern Appalachian Mountains. 21 pp., 4 plates, 1 map, 1 table. $1.70
OP 577 Test, F.H., 1956.
Two new dendrobatid frogs from northern Venezuela. 9 pp. $0.70
OP 583 Dowling, H.G., 1957.
A taxonomic study of the ratsnakes, genus Elaphe Fitzinger, V: The Rosalie section. 27 pp., 2 plates, 2 figures, 1 map, 1 table. OOP
OP 584 Thompson, F.G., 1957.
A new Mexican gartersnake (genus Thamnophis) with notes on related forms. 15 pp., 2 plates, 1 map. $1.20
OP 587 Rabb, G.B., 1958.
On certain Mexican salamanders of the plethodontid genus Chiropterotriton. 43 pp., 3 plates, 3 figures, 1 map, 13 tables. $3.40
OP 589 Duellman, W.E., 1958.
A preliminary analysis of the herptofauna of Colima, Mexico. 22 pp., 2 maps, 1 table. $1.80
OP 592 Uzzell, T.M., Jr., 1958.
Generic status of the teiid lizard Gonioptychus bicolor Werner. 4 pp. $0.50
OP 594 Duellman, W.E., 1958.
A review of the frogs of the genus Syrrhophus in western Mexico. 19 pp., 3 plates, 1 map, 1 table. $1.50
OP 597 Uzzell, T.M., Jr., 1959.
Teiid lizards related to Proctoporus luctuosus, with the description of a new species from Venezuela. 15 pp., 1 figure, 1 map, 3 tables. $1.20
OP 598 Duellman, W.E. and A.S. Duellman, 1959.
Variation, distribution, and ecology of the iguanid lizard Enyaliosaurus clarki of Michoacan, Mexico. 11 pp., 1 plate, 2 figures, 2 tables. $1.00
OP 601 Hartweg, N., 1959.
A new colubrid snake of the genus Geophis from Michoacan. 6 pp., 1 plate, 1 figure, 1 table. $0.60
OP 605 Duellman, W.E., 1959.
Two new snakes, genus Geophis, from Michoacan, Mexico. 9 pp., 1 plate, 2 figures, 1 table. $0.90
OP 606 Uzzell, T.M., Jr., 1959.
Teiid lizards of the genus Placosoma. 16 pp., 1 map, 1 figure, 2 tables. $1.30
OP 642 Adler, K., 1965.
Three new frogs of the genus Hyla from the Sierra Madre del Sur of Mexico. 19 pp., 1 colored plate, 4 figures, 1 table. $1.50
OP 647 Zug, G.R., 1966.
The penial morphology and the relationships of cryptodiran turtles. 24 pp., 5 figures, 1 table. $1.90
OP 649 McCoy, C.J. and C.F. Walker, 1966.
A new salamander of the genus Bolitoglossa from Chiapas. 11 pp., 1 plate, 3 figures, 1 table. $1.00
OP 656 Ballinger, R.E. and D.W. Tinkle, 1968.
A new species of Uta (Sauria: Iguanidae) from Salsipuedes Island, Gulf of California, Mexico. 6 pp. $0.60
OP 669 Gans, C. and G.C. Lehman, 1973.
Studies on amphisbaenians (Amphisbaenia: Reptilia), 5: The species of Monopeltis from north of the River Zaire. 34 pp., 23 figures, 2 tables. $2.80
OP 678 Lynch, J.D., 1977.
A new species of Eleutherodactylus from the Cordillera Occidental of Colombia (Amphibia: Anura: Leptodactylidae). 6 pp., 2 figures. $1.00
OP 682 Nussbaum, R.A., 1977.
Rhinatrematidae: a new family of caecilians (Amphibia: Gymnophiona). 30 pp., 3 figures, 2 tables. $3.00
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OP 685 Downs, F.L., 1978.
Unisexual Ambystoma from the Bass Islands of Lake Erie. 36 pp., 8 figures, 4 tables. $3.00
OP 686 Collins, J.P. and H.M. Wilbur, 1979.
Breeding habits and habitats of the amphibians of the Edwin S. George Reserve, Michigan, with notes on the local distribution of fishes. 34 pp., 3 figures, 6 tables. $2.70
OP 687 Nussbaum, R.A., 1979.
The taxonomic status of the caecilian genus Uraeotyphlus Peters. 20 pp., 4 figures, 1 table. $2.00
OP 688 Kluge, A.G., 1979.
The gladiator frogs of Middle America and Colombia -- a reevaluation of their systematics (Anura: Hylidae). 24 pp., 8 figures, 1 table. $2.40
OP 690 Duellman, W.E., 1980.
A new species of marsupial frog (Hylidae: Gastrotheca) from Venezuela. 7 pp., 1 figure, 1 table. $1.20
OP 691 Greer, A.E. and A.G. Kluge, 1980.
A new species of Lampropholis (Lacertilia: Scincidae) from the rainforests of northeastern Queensland. 12 pp., 4 figures, 1 table. $1.50
OP 695 Tilley, S.G., 1981.
A new species of Desmognathus (Amphibia: Caudata: Plethodontidae) from the southern Appalachian Mountains. 23 pp., 10 figures, 3 tables. $2.40
OP 697 Lynch, J.D., 1981.
Two new species of Eleutherodactylus from western Colombia (Amphibia: Anura: Leptodactylidae). 12 pp., 4 figures. $1.50
OP 700 La Marca, E. and H.M. Smith, 1982.
Eleutherodactylus colostichos, a new frog species from the Páramo de los Conejos, in the Venezuelan Andes (Anura: Leptodactylidae). 8 pp., 2 figures. $1.70
OP 704 Harris, D.M., 1982.
The Sphaerodactylus (Sauria: Gekkonidae) of South America. 31 pp., 5 figures, 4 tables. $3.10
OP 706 Harris, D.M. and A.G. Kluge, 1984.
The Sphaerodactylus (Sauria: Gekkonidae) of Middle America. 59 pp., 18 figures, 1 table. $5.90
OP 709 Kraus, F., 1985.
A new unisexual salamander from Ohio. 24 pp., 11 figures, 6 tables. $3.20
OP 710 La Marca, E., 1985.
A new species of Colostethus (Anura: Dendrobatidae) from the Cordillera de Mérida, northern Andes, South America. 10 pp., 4 figures. $1.70
OP 711 Lynch, J.D. and P.M. Ruíz-Carranza, 1985.
A synopsis of the frogs of the genus Eleutherodactylus from the Sierra Nevada de Santa Marta, Colombia. 59 pp., 21 figures. $5.90
OP 713 Nussbaum, R.A., 1985.
Systematics of caecilians (Amphibia: Gymnophiona) of the family Scolecomorphidae. 49 pp., 10 figures, 15 tables. $4.90
OP 715 Tolson, P.J., 1987.
Phylogenetics of the boid snake genus Epicrates and Caribbean vicariance theory. 68 pp., 26 figures, 5 tables. $6.80
OP 716 Nussbaum, R.A. and M. Wilkinson, 1987.
Two new species of Chthonerpeton (Amphibia: Gymnophiona: Typhlonectidae) from Brazil. 15 pp., 3 figures, 1 table. $1.50
OP 728 Ramanamanjato, J.B., R.A. Nussbaum, and C.J. Raxworthy, 1999.
A new species of Mabuya Fitzinger (Squamata: Scincidae: Lygosominae) from northern Madagascar. 22 pp., 9 tables, 5 figures. $2.20
OP 739 Raselimanana, A.P., R.A. Nussbaum and C.J. Raxworthy, 2006.
Observations and re-description of Zonosaurus boettgeri Steindachner 1891 and description of a second new species of long-tailed Zonosaurus from western Madagascar. 16 pp., 2 tables, 2 figures (1 color). $2.20
OP 744 Wilkinson, M., A. O'Connor, R.A. Nussbaum, 2013.
Taxonomic status of the neotropical Caeciliam genera Brasilotyphlus Taylor, 1968, Microcaeilia Taylor, 1968 and Parvicaecilia Taylor, 1968 (Amphibia: Gymnophiona: Siphonopidae). 12pp. $4.60
OP 745 Kraus, F., 2015.
A new species of the miniaturized frog genus Paedophryne (Anura: Microhylidae) from Papua New Guinea. $4.00
