Occasional Papers

OP 7 Walker, B., 1915.
Results of the Mershon Expedition to the Charity Islands, Lake Huron: Mollusca. 7 pp. $0.70

OP 15 Walker, B., 1915.
A list of shells collected in Arizona, New Mexico, Texas and Oklahoma by Dr. E.C. Case. 11 pp. $1.00

OP 29 Walker, B., 1916.
The Mollusca collected in northeastern Nevada by the Walker-Newcomb Expedition of the University of Michigan. 8 pp., 1 figure, 11 tables. $0.80

OP 38 Walker, B., 1917.
The type of Pleurocera rafinesque. 10 pp. $0.90

OP 42 Winslow, M.L., 1917.
An annotated list of shells from northern Michigan. 16 pp., 1 table. $1.30

OP 45 Walker, B., 1917.
The method of evolution in the Unionidae. 10 pp. OOP

OP 49 Walker, B., 1918.
Notes on North American Naiades, I. 6 pp. OOP

OP 51 Winslow, M.L., 1918.
Pleurobema clava (Lam.) and Planorbis dilatatus buchanensis (Lea) in Michigan. 6 pp., 1 plate. $0.60

OP 58 Walker, B., 1918.
Foreign land snails in Michigan. 3 pp. $0.50

OP 64 Walker, B., 1919.
A new species of Camptoceras. 7 pp., 1 plate. $0.70

OP 73 Walker, B., 1919.
New species of Amnicola from Guatemala. 5 pp., 1 plate. $0.60

OP 74 Walker, B., 1919.
Notes on North American Naiades, II. 10 pp., 2 plates. $0.90

OP 78 Hinckley, A.A., 1920.
A new species of Goniobasis. 3 pp., 1 figure. $0.50

OP 79 Winslow, M.L., 1920.
Note on Oreohelix idahoensis baileyi Bartsch. 5 pp., 1 plate. $0.60

OP 91 Goodrich, C., 1921.
Three new species of Pleuroceridae. 7 pp., 1 plate. $0.70

OP 98 Winslow, M.L., 1921.
Mollusca of North Dakota. 18 pp., 1 figure. $1.45

OP 102 Winslow, M.L., 1921.
Shells from Alcona, Oscoda and Crawford counties, Michigan. 5 pp. $0.60

OP 106 Baker, H.B., 1922.
The Mollusca collected by the University of Michigan-Walker Expedition in southern Vera Cruz, Mexico, I. 95 pp., 17 plates, 11 tables. $7.60

OP 111 Baker, H.B., 1922.
The Mollusca of Dickinson County, Michigan. 45 pp., 7 tables, 1 map. $3.60

OP 112 Ortmann, A.E. and Walker, B., 1922.
On the nomenclature of certain North American Naiades. 75 pp. $6.00

OP 128 Winslow, M.L., 1922.
Notes on the internal lamellae of Carychium. 17 pp., 5 plates. $1.35

OP 135 Baker, H.B., 1923.
The Mollusca collected by the University of Michigan-Walker Expedition in southern Vera Cruz, Mexico, IV. 18 pp., 1 plate. $1.45

OP 137 Baker, H.B., 1923.
The Mollusca collected by the University of Michigan-Williamson Expedition in Venezuela, Part I: Curacao. 58 pp., 5 plates, 2 figures. $4.60

OP 145 Winslow, M.L., 1923.
Two new freshwater snails from Michigan. 5 pp., 1 plate. $0.60

OP 152 Baker, H.B., 1924.
Land and freshwater molluscs of the Dutch Leeward Islands. 159 pp., 21 plates, 14 tables. $12.70

OP 156 Baker, H.B., 1925.
The Mollusca collected by the University of Michigan-Williamson Expedition in Venezuela, Part III: Pupillidae to Oleacinidae. 56 pp., 11 plates, 4 figures. $4.50

OP 157 Walker, B., 1925.
Notes on South American Ancylidae, I. 9 pp., 1 plate, 1 figure. $0.90

OP 161 Clench, W.J., 1925.
Notes on the genus Physa with descriptions of three new subspecies. 12 pp., 1 plate. $1.00

OP 163 Walker, B., 1925.
A new species of Micromya. 6 pp., 1 plate. $0.60

OP 164 Clench, W.J., 1925.
Descriptions of a new species of Physa from the Pleistocene of Florida. 5 pp., 1 plate. $0.60

OP 165 Walker, B., 1925.
New species of North American Ancylidae and Lancidae. 13 pp., 3 plates. $1.10

OP 167 Baker, H.B., 1926.
The Mollusca collected by the University of Michigan-Williamson Expedition in Venezuela, Part IV. 65 pp., 8 plates. OOP

OP 168 Clench, W.J., 1926.
Three new species of Physa. 8 pp., 1 plate. $0.80

OP 173 Baker, H.B., 1926.
A new slug from Guadeloupe. 6 pp., 1 plate. $0.60

OP 175 Walker, B., 1926.
Notes on South African Ancylidae, I. 10 pp., 2 plates. $0.90

OP 180 Winslow, M.L., 1926.
The varieties of Planorbis campanulatus Say. 13 pp., 2 plates. $1.10

OP 181 Winslow, M.L., 1926.
A revised check list of Michigan Mollusca. 28 pp. $2.20

OP 182 Baker, H.B., 1927.
The Mollusca collected by the University of Michigan-Williamson Expedition in Venezuela, Part V. 50 pp., 7 plates. OOP

OP 192 Goodrich, C., 1928.
Strephobasis: a section of Pleurocera. 19 pp., 2 plates. $1.50

OP 193 Baker, H.B., 1928.
Mexican mollusks collected for Dr. Bryant Walker in 1926, I. 65 pp., 6 plates. $5.20

OP 209 Goodrich, C., 1930.
Goniobases of the vicinity of Muscle Shoals. 25 pp. $2.00

OP 210 Baker, H.B., 1930.
The Mollusca collected by the University of Michigan-Williamson Expedition in Venezuela, Part VI. 93 pp., 7 plates. $7.50

OP 220 Baker, H.B., 1930.
Mexican mollusks collected for Dr. Bryant Walker in 1926, Part II: Auriculidae, Orthurethra, Heterurethra, and Aulacopoda. 55 pp., 5 plates. $4.40

OP 223 Goodrich, C., 1931.
The pleurocerid genus Eurycaelon. 11 pp., 1 plate. $1.00

OP 226 Krull, W.H., 1931.
Importance of laboratory-raised snails in helminthology with life history notes on Gyraulus parvus. 12 pp., 1 plate. $1.00

OP 229 Goodrich, C., 1931.
Pleurobema aldrichianum, a new naiad. 6 pp., 1 plate. $0.60

OP 233 Goodrich, C., 1931.
Mollusks of Keweenaw County, Michigan. 11 pp., 1 plate. $0.90

OP 238 Goodrich, C. and H. van der Schalie, 1932.
I: On an increase in the naiad fauna of Saginaw Bay, Michigan; II: The naiad species of the Great Lakes. 14 pp. $1.10

OP 258 van der Schalie, H., 1933.
Notes on the brackish water bivalve, Polymesoda caroliniana (Bosc.). 9 pp., 1 plate, 1 map. $0.90

OP 269 Baker, H.B., 1933.
A checklist of the Nearctic Zonitidae. 14 pp. $1.10

OP 276 Archer, A.F., 1933.
A study of Polygyra inflecta (Say). 8 pp. $0.80

OP 286 Goodrich, C., 1934.
Studies of the gastropod family Pleuroceridae, I. 19 pp., 1 plate, 1 table. $1.50

OP 295 Goodrich, C., 1934.
Studies of the gastropod family Pleuroceridae, II. 6 pp., 1 figure, 3 tables. $0.60

OP 300 Goodrich, C., 1934.
Studies of the gastropod family Pleuroceridae, III. 11 pp., 1 table. $1.00

OP 311 Goodrich, C., 1935.
Studies of the gastropod family Pleuroceridae, IV. 11 pp., 2 tables. $0.90

OP 318 Goodrich, C., 1935.
Studies of the gastropod family Pleuroceridae, V. 12 pp., 1 table. $1.00

OP 340 Archer, A.F., 1936.
The land Mollusca of Cheboygan County, Michigan. 15 pp. $1.20

OP 347 Goodrich, C., 1937.
Studies of the gastropod family Pleuroceridae, VI. 12 pp., 6 tables. $1.00

OP 376 Goodrich, C., 1938.
Studies of the gastropod family Pleuroceridae, VII. 12 pp. $1.00

OP 392 van der Schalie, H., 1938.
The naiades (fresh-water mussels) of the Cahaba River in northern Alabama. 29 pp., 1 map, 5 tables (1 foldout). $2.30

OP 398 Archer, A.F., 1939.
The ecology of the Mollusca of the Edwin S. George Reserve, Livingston County, Michigan. 24 pp. $1.90

OP 399 van der Schalie, H., 1939.
Hendersonia occulta (Say) in Michigan; its distribution, ecology, and geological significance. 9 pp., 1 plate, 1 map, 2 tables. $0.90

OP 402 Goodrich, C., 1939.
The scientific writings of Bryant Walker: An annotated bibliography. 29 pp. $2.30

OP 404 Goodrich, C., 1939.
Pleuroceridae of the St. Lawrence River basin. 4 pp. $0.50

OP 406 Goodrich, C., 1939.
Pleuroceridae of the Mississippi River basin exclusive of the Ohio River system. 4 pp. $0.50

OP 407 van der Schalie, H., 1939.
Medionidus mcglameriae, a new naiad from the Tombigbee River, with notes on other naiads of that drainage. 7 pp., 1 plate, 2 tables. $0.70

OP 413 van der Schalie, H., 1940.
Notes on Mollusca from Alta Vera Paz, Guatemala. 11 pp., 1 map, 1 table. $1.00

OP 417 Goodrich, C., 1940.
The Pleuroceridae of the Ohio River drainage system. 21 pp. $1.70

OP 426 Goodrich, C., 1941.
Two new species of Goniobasis. 4 pp., 2 figures. $0.50

OP 427 Goodrich, C., 1941.
Pleuroceridae of the small streams of the Alabama River system. 10 pp. $0.80

OP 428 Goodrich, C., 1941.
Distribution of the gastropods of the Cahaba River, Alabama. 30 pp. $2.40

OP 432 van der Schalie, H. and F. Locke, 1941.
Hermaphroditism in Anodonta grandis, a freshwater mussel. 13 pp., 3 plates, 1 table. $1.10

OP 447 Goodrich, C., 1941.
Studies of the gastropod family Pleuroceridae, VIII. 13 pp. $1.10

OP 448 Neel, J.K., 1941.
A taxonomic study of Quadrula quadrula (Rafinesque). 9 pp., 1 plate, 1 figure. $0.90

OP 456 Goodrich, C., 1942.
The Pleuroceridae of the Atlantic Coastal Plain. 6 pp. $0.60

OP 469 Goodrich, C., 1942.
The Pleuroceridae of the Pacific coastal drainage, including the western interior basin. 4 pp. $0.50

OP 475 Goodrich, C., 1943.
The Walker-Beecher paper of 1876 on the Mollusca of the Ann Arbor area. 26 pp., 1 map. $2.10

OP 485 Goodrich, C., 1944.
Pleuroceridae of the Great Basin. 11 pp., 2 figures. $1.00

OP 490 Goodrich, C., 1944.
Variations in Strombus pugilis alatus. 10 pp., 2 tables. $0.90

OP 524 Harry, H.W., 1950.
Studies on the nonmarine Mollusca of Yucatán. 34 pp., 3 figures, 6 tables. $2.70

OP 531 Young, F.N., 1951.
Vanishing and extinct colonies of tree snails, Liguus fasciatus, in the vicinity of Miami, Florida. 21 pp., 1 foldout map. $1.70

OP 533 Lee, C.B., 1951.
Succinea vaginacontorta (Section Calcisuccinea), a new amber snail from Kansas. 12 pp., 2 plates, 1 figure. $1.00

OP 557 Taylor, D.W., 1954.
A new Pleistocene fauna and new species of fossil snails from the high plains. 16 pp. $1.30

OP 566 Solem, A., 1955.
Mexican mollusks collected for Dr. Bryant Walker in 1926, XI: Drymaeus. 31 pp., 5 plates, 1 table. $2.50

OP 579 van der Schalie, H. and D.S. Dundee, 1956.
The morphology of Pomatiopsis cincinnatiensis (Lea), an amphibious prosobranch snail. 31 pp., 7 plates. $2.50

OP 590 Burch, J.B. and F.G. Thompson, 1957.
Three new Mexican land snails of the genus Humboldtiana. 21 pp., 5 plates, 1 map, 1 foldout table. $1.70

OP 591 Thompson, F.G., 1957.
A collection of mollusks from northern Venezuela. 13 pp., 2 plates. $1.10

OP 595 Young, F.N., 1958.
Extinct or near extinct colonies of tree snails, Liguus fasciatus, in eastern Broward and northern Dade counties, Florida. 20 pp., 2 maps. $1.60

OP 596 Herrington, H.B. and D.W. Taylor, 1958.
Pliocene and Pleistocene Sphaeriidae (Pelecypoda) from the central United States. 29 pp., 1 plate, 2 tables. OOP

OP 600 Thompson, F.G., 1959.
Two new pleurocerid snails from eastern Mexico. 11 pp., 1 plate, 1 figure. $1.00

OP 602 Basch, P.F., 1959.
Status of the genus Gundlachia (Pulmonata, Ancylidae). 9 pp., 2 figures, 1 table. $0.90

OP 610 Thompson, F.G., 1959.
A new helicid snail from Mexico. 9 pp., 1 plate, 2 figures. $0.90

OP 611 Solem, A., 1959.
Notes on Mexican mollusks, II. 15 pp., 2 plates, 3 tables. $1.20

OP 612 Basch, P.F., 1959.
Land Mollusca of the Tikal National Park, Guatemala. 15 pp. $1.20

OP 633 van der Schalie, H. and A. van der Schalie, 1963.
The distribution, ecology, and life history of the mussel, Actinonaias ellipsiformis (Conrad), in Michigan. 17 pp., 3 plates, 1 figure, 2 tables. $1.35

OP 637 Burch, J.B., 1964.
A new species of freshwater limpet, genus Gundlachia, from Japan. 7 pp., 15 figures. $0.70

OP 638 Burch, J.B., 1964.
Chromosomes of the succineid snail Catinella rotundata. 8 pp., 14 figures. $0.80

OP 641 van der Schalie, H., 1965.
Observations on the sex of Campeloma (Gastropoda: Viviparidae). 15 pp., 5 plates, 1 figure. $1.20

OP 646 Bates, J.M., 1966.
A new species of Carunculina (Unionidae: Pelecypoda) from the Savannah River, South Carolina. 9 pp., 1 plate, 3 figures, 1 table. $0.90

OP 729 Graf, D.L., 2000.
The Etherioidea revisited: a phylogenetic analysis of hyriid relationships (Mollusca: Bivalvia: Paleoheterodonta: Unionoida). 21 pp., 3 tables, 2 figures, 3 appendices. $2.20

OP 740 Burch, J.B., 2007.
A new species of land snail (Stylommatophora: Partulidae) from Raiatea, French Polynesia, Oceania. 8 pp., 3 figures (2 color). $1.80