282 



[November, 



Formations in 



ascending order. 



12 3 4 5 



Gen, SCALARIA 

 S. CERITHIF0EMI3, Meek & Hayden, Proo. Acad, Nat. Sc. Phila., v. 8, p. 63 



Gen. TURRITELLA 

 T.? coNVEXA, Meek & Hayden, Proc. Acad. Nat, Sci. Philada.,vol. 8, p. 70 

 T. MoEEAUENSis, Meek & Hayden, " " " " 



Gen. ACTEON. 

 A. coNciNNus, Hall & Meek, Mem. Ac. Arta & Sci. Bost.,v. 8, N. S.,p. 390 

 A. soBELLiPTicus, Meek 8e Hayden, Proc. Acad. Nat. Sc. Phila., v. 8, p. 63 



Gen. AVAL AN A. 

 A. 8UBGL0B0SA, Meek & Hayden, Proc. Acad. Nat. Sci. Philada., v. 8, p. 64 



Gen. NATICA. 



N. TuoMYANAjMeek & Hayden, (see accompanying paper.) 



N. OBLiQDATA, Hall & Meek,Mem. Am, Ac. Art. & Sc. Bost., V. 5, N. S. p. 389 



N. coNCiNNA, Hall &Meek, " 



N. PALUDINAF0RMI3, Hall & Meek, 



N? AMBiGUA, Meek & Hayden, Proc. Acad. Nat. Sci. Phila., vol. 8, p. 64 



N. SUBCRASSA, Meek & Hayden, " " " " 87 



N. oociDENTALis, Meek & Hayden, " 



N. MoREAUENSis, Meek & Hayden, " 



Gen. SOLARIUM. 

 S. FLExiSTRiATUM, Evans & Shumard,Proc. Ac. Nat. Sc. Phila., v. 7, p. 163 



Gen. TURBO. 



T. Nebrascensis, Meek & Hayden, Proc Acad. Nat. Sci. Phila., t. 8, p. 64 

 T. tenuilineatus. Meek & Hayden, " 



Gen, ROSTELLARIA 



R. Nebrascensis, Evans & Shumard, Proc. Ac. Nat. Sc. Phila., v. 7, p. 164 

 R. FusiFORMis,Hall& Meek, Mem. Am. Ac. Art. &Sc. Bost., v. 5,N. S. p. 393 

 R. biangulata, Meek & Hayden, Proc. Acad. Nat. Sci. vol. 8, p. 65 





11 

 



II 

 <i 



'< 64 

 " 64 



Gen. FUSUS. 



F. Shumardii, Hall & Meek, Mem. Am. Ac. Art. & Sc. Bost., v. 5,N. S. p. 391 



F? tenuilineatus, Hall & Meek, " 



F. Dakotaensis, Meek & Hayden, Proc. Acad. Nat. Sc. Phila., vol. 8, p. 65 



F. Galpinanus, Meek & Hayden, 



F. contortus. Meek & Hayden, 



F. CuLEERTSONi, Meek & Hayden, 



F. FLEXuocosTATUs, Meek & Hayden, 



F. Newberryi, Meek & Hayden. 



Gen. BUSYCON. 



B. Bairdi, Meek & Hayden, Proc. Acad. Nat. Sci. Phila., vol. 8, p. 126. 

 Pyrula Bairdi, Meek & Hayden, " " " " 



Gen. FASCIOLARIA, 



F. cretacea, Meek & Hayden, Proc. Acad. Nat. Sc. Phila., vol. 8, p. 63.. 

 F. buccinoides, Meek & Hayden, " " " " p. 67.. 



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