72 CiiicinnaU Society of Natural Hhtory. 



Genus CUdophorns, Hall. Gr. kleis, a bolt; phero^ I bear. 



222 Clidophorus fabiilus, Hall, \j.fahxda, a small bean. 



223 planulatus, Conrad. L. ^ZanitZa, a small plane. 



224 major, Ulrich. L. major, greater. 



Family Anatinidoi. L. anatinus, pertaining to a duck. 



Genus Cunearaya, Hall and Whitfield. L. cxneus, a wedge; Gr. mi/ax^ 



a mussel. 



225 Cuneamya Miamiensis, Hall and Whitfield. 



226 scapha, Hall and Whitfield. L. scapha, a skiff. 



227 curta, Whitfield. L. curtus, cut off. 



228 ampla, Ulrich. L. amplus, large. 



Family Pteriniidce. Gr. pteron, a wing. 



Genus Pterlnea, Goldfuss. 



229 Pterinea demissa, Conrad. L. demisstis, lowered. 



230 insueta, Conrad. L. insuetus, unusual. 



231 corrugata, James. L. corrugatus, wrinkled. 



232 Welchi, James. 



Family Mytiliidoi. L. mytilus, a mussel. 



Genus Anodontopsis, McC'oy. Gr. a, not; odous, a tooth; ops/g, ap- 

 pearance. 



233 Anodontopsis, Milled. Meek. 



234 unionoides, Meek. L. unio, a pearl; eidos, form. 



Genus modiolojysis, Hall. L. modiolus, a small measure; o;js/.v, appear- 

 ance. 



235 Modiolopsis anodontoides, Conrad. Gr. a, not; odous, eidos. 



236 Cincinnatiensis, Hall and Whitfield. 



237 concentrica, Hall and Whitfield. L. con; centrum, the center. 



238 curta, Hall. L. curfus, shortened. 



239 faba, Conrad, lu.faba, a bean. 



240 modiolaris, Conrad. L. modiolus, a measure. 



241 nasuta, Conrad. L. iiasutus, long nosed. 



242 pholadiformis, Foster and Whitney. Gr. p)holas, a borer: 



forma .^ form. 



243 terminalis, Hall. L. ^erm/»r<Z/cS, pertaining to the boundary. 



244 truncata, Hall. L. truncatus, cut short. 



245 .Versaillesensis, S. A. Miller. 



