284 



[November, 



Formations in 

 ascending order. 



Gen. TELLINA. 

 T.? CHKYENNENSis, Meek & Hayden, Proc. Acad. Nat. Sc. Phila., vol. 8, p. 82 

 T. EQUiLATERALis, Meek & Hayden, " " " " 

 T. sciTULA, Meek & Hayden, " " " " 

 T. SUBBLLIPTICA, Meek & Hayden, " " " " p. 83 

 T. Prouti, Meek & Hayden, " " " 

 T. SUBTORTUOSA, Meek & Hayden, (accompanying paper) 



Gen. CYTHEREA. 



C. Mis30URiANA, Morton, Jour. Acad. Nat. Sc. Phila., vol. 8, p. 210 



C. ORBicuLATA, Hall & Meek, Mem. Am. Ac. Art. & Sc. Bost., v. 5, N. S. p. 382 

 C. TENUIS, Hall & Meek, " " " " 383 



C* Deweyi, Meek & Hayden, Proc. Acad. Nat. Sc. Phila., vol. 8, p. 83..., 

 C. Nbbrascensis, Meek & Hayden, " " " " 



C. PELLUCiDA, Meek & Hayden, (accompanying paper) 



C. OwENANA, Meek & Hayden, " " 



Gen. VENUS. 

 v.? ciEOULARis, Meek & Hayden, (accompanying paper) 



Gen. LEDA. 



L. VENTEICOSA, 



Corbula ventricosa, Meek & Hayden, Proc. Ac. Nat. Sc. Phila., v. 8, p. 83 



L. MOREAUENSIS,, 



Corbula Moreauensis, Meek & Hayden, Proc. Acad. Nat. Sci. Phila., vol. 

 8, p. 83 '. 



Gen. CORBULA. 

 C? GREGARiA, Meek & Hayden, Proc. Acad. Nat. Sci. Phila., vol. 8, p. 84 



Gen. THRACIA. 



T.? GRACILIS,* 



TelUna gracilis, Meek & Hayden, Pioc. Acad. Nat. Sc. Phila., v. 8, p. 82 



Gen. ASTARTE. 

 A. GREGARIA, Meek & Hayden, Proc. Acad. Nat. Sci. Phila., vol. 8, p. 84... 



Gen. CRASSATELLA. 

 C. EvANSi, Hall & Meek, Mem. Am. Acad. Art. & Sc. Bost., v. 5, N. S. p. 383 



Gen. LUCINA. 

 L. stJBUNDATA, Hall & Meek, Mem. Am. Acad. Arts & Sci. Bost., vol. 5, 



New Ser. p. 382. 

 L. occiDENTALis, Meek & Hayden, (acompanying paper) 



?Tellina occidentalism Morton, Jour. Acad. Nat. Sc. Phila., v. 8, pi. xi. fig. 3 

 Mould of Lucina? Owen, report, Iowa, Wis. and Min. tab. vii. fig. 8 



Gen. HETTANGIA. 

 H. Americana, Meek & Hayden, (accompanying paper) 



Gen. CARDIUM. 

 C. spECiosuM, Meek k Hayden, (accompanying paper) |^? 



* Although now satisfied this species is not a Tellina, we are still in doubt about its 

 affinities, and place it provisionally in the above genus, until specimens showing the 

 hinge and interior caq be seen. 



