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55.

Unio cariosus, Say. Silver Lake. Fourth Lake.
cornutus, Barnes. Neenah River. (Mr. Barnes.)
compressus, Lea. Milwaukee River.
donaciformis, Lea. (U. zig-zagy, Lea.] Wisconsin River at Prairie du Sac.
elegans, Lea. [U. truncatus Raf.] Wisconsin River at Prairie du Sac.
ellipsis, Lea. Wisconsin River at Prairie du Sac.
gracilis, Barnes. Rock River. Wisconsin River at Prairie du Sac.
gibbosus, Barnes. Milwaukee, Manitowoc, Rock, and Wis. Rivers.
iris, Lea. [U. subrostratus, Raf.] Milwaukee and Rock Rivers.
luteolus, Lam. [U. siliquoidens and U. inflatus, Barnes.] Milwaukee and Rock Rivers. Pike Creek. Wis. River, (Mr. Barnes.)
Mytiloides, Raf. Rock River. Wisconsin River at Prairie du Sac.
mucronatus, Barnes. Wisconsin River. (Mr. Barnes.)
nodosus, Barnes. [U. metanevrus, Raf.] Wis. River at Prairie du Sac.
ovatus? Barnes. Milwaukee and Rock Rivers.
plicatus, Barnes. Rock River. Wisconsin River at Prairie du Sac.
pustulosus, Lea. [U. verrucosus, albus, Hildreth.] Rock River. Wisconsin River at Prairie du Sac.

planus, Barnes, Barnes. [U. leptodon, Raf. U. tenuissimas, Lea. Wis. River, (Mr. Barnes).
parvus, Barnes. Neenah River, (Mr. Barnes.)
radiatus, Lam. Wisconsin River, (Mr. Barnes.)
rectus, Lam. [U. proelongus, Barnes.] Rock River. Wis. River at Prairie du Sac. Neenah River, (Mr. Barnes.)
schoolcraftensis, Lea. [A young pustulosus?] Neenah River, (Mr. Lea.]
trigonus, Lea. Milwaukee and Rock River.
tuberculatus, Barnes. Neenah River, (Mr. Barnes.) Wisconsin River at Prairie du Sac.
Undatus, Barnes. Neenah River, (Mr. Barnes). Wisconsin River at Prairie du Sac.
ventricosus, Barnes. Mississipi, at Prairie du Chien, Wisconsin River, (Mr. Barnes).
verrucosus, Barnes. Wisconsin River, (Mr. Barnes.) Rock River.

Alasmoedonta rugosa, Barnes. Wis. and Neenah Rivers, (Mr. Barnes.) Milwaukee and Rock Rivers.
marginata, Say. Milwaukee and Rock Rivers.
complanata, Barnes. Wis. and Neenah Rivers, (Mr. Barnes, Rock River).