369 



ORDEK ACEPHALA. 



Unio, Bruguieres. 



buUatus, Rat'.* [U. pustulosus, Lea.j Rock River. Wisconsin River at 



Prairio du Sac. 

 cardium, Raf, [U. ventricosiis, Barnas.] Mississippi at Prairie da 



Chien. Wisconsin River, (Mr. Barnes.) 

 cariosus, Say. Silver Lake. Fourth Lake. 



clava, Lam. [U. mytiloides, Raf.] Rock River. Wisconsin at Prairie 



du Sac. 

 dilatu«, Raf. [U. gibbosus, Bar.] Manitowoc, Rock and Wisconsin Rivers, 

 fasciolaris, Raf. [LJ. pbaseolus, Hildreth, U. mucronatus Bar.] Wis- 

 consin River, (Mr. Barnes.) 

 fasciatus, Raf. [U. crassus, U. ellipticus. and U. carinatus, Barnes.] At 

 Prairie du Chien, (Mr. Say.) Wisconsin and Nee- 

 nah Rivers, (Mr. Barnes.) Rock River, 

 luteolus, Lam. [U. sih"quoideus, and U. inflatus, Bar.] Milwaukee and 

 Rock Rivers. Pike Creek. Wisconsin River, (Mr. Barnes.) 

 metanervus, Raf. [U. nodosa?. Bar.] Wisconsin River at Prairie du Sac. 

 nervosus, Raf. [IT. zigzag, and U. douaciformis, Lea,] Wisconsin 



River at Prairie du 8ac. 

 olivarius, Raf. [U. ellipsis, Lea.] Wisconsin River at Prairie du Sac. 

 parvus, Barnes. Neeuah (Fox) River, (Mr. Barnes.) 

 prasinus, Conrad. [U. Schoolcraftensis, Lea.] Neenah River, (Mr. Lea.) 

 radiatus. Lam. Wisconsin River. (Mr. Barnes.) 



rectus, Lam. [U. prcelongus, Barnes.] Rock River. Wisconsin River at 



Prairie du Sac. Neenah River, (Mr. Barnes.) 

 reflexus, Raf. [U. eornulus Bar.] Xeenali River, (Mr. Barnes.) 

 subrostratiis, R;if. [U. ii-is, Lea.] Milwaukee and Root Rivers, 

 trigonus. Lea. jMilwaukee, Sheboygan and Rock Rivers, 

 truncatus, Raf. [U. elegans. Lea.] ' Wisconsin River at Prairie du Sac. 

 tuberculatus, Raf. [U. verrucosos. Bar.] Wisconsin River, (Mr. Barnes) 



Rock River, 

 undatus, Bar. Neenah River, (Mr. Barnes,) Wisconsin at Pr. du Sac. 

 verrucosus, Raf. [U. tuberculatus. Bar.] Neenah River, (Mr. Barnes) Wis. 



River at Prairie du Sac. 

 Met.4ptera, Rafinesque, Agassiz. 



alata, Conrad, [Unio alatus. Say] Milwaukee, Rock, Neenah, Wisconsin 



and Sheboygan Rivers, 

 fragilis. Con. [U. fragilis, Sav. U. gracilis, Bar.] Sheboygan and Rock 



Rivers. Wisconsin River at Prairie du S.ac. 

 Plectomerus, Conrad. 



(Proc. Ac. Nat. Sc, vol. VI, p. 260.; 



plicatus. Con. [Unio plicatus Bar.] Rock River. Wisconsin Ri^er at 



Prairie du Sac. 



*I follow 'Mr. T. A. Conrr.d's Syuopsis of the Family of Xaiades, recently publislied, 

 (Proc. of ibe Acad, of Xat. Sv'iences, vol. VI, p. 243,) for reasons there given, which 

 appear to be conclusive. 



