22 Cincinnati Society of Natural History. 



his Gonvolutus; from the Yellow Stone, Melania antlionyi^ now Hydro- 

 hia anthonyi; and from near the head waters of the Little Missonri, 

 Ceritliium nebrascense, now Cerithidea nehrascensis. 



From (the Fort Pierre Group)* No. 4, of the Cretaceous in Nebraska, 

 Actoion suhellij)ticus, Turbo nebrascensis, now Margarita nebrascensis, 

 Bostellaria biangulata, now Aporrhais biangulata, Helcion sexsulca- 

 tus, now Anisomyon sexsidcatum. H. patelliformis^ now A. patelli- 

 ^orrne, H. alveolus, now A. alveolus, U. subovatus, now-^1. subovatum^ 

 Bulla occidentalis, now Haminea occide?! talis, Turritella convexa, 

 Ammonites halli, now Phylloceras halli, Ancyloceras nebrascense, now 

 Heteroceras nebrascense, A. cheyenense, now H. cheyenense, Avicula 

 fibrosa, now Pseudoj^ter a fibrosa; from near the mouth of Milk river. 

 Bulla sub cylindrical, now Ilaminea subcylindrica, Venus circularis, 

 now Thetis circularis, Cytherea pellacida, now Callista 2^^llucida; 

 Cuculloia exigua, now Trigonarca exigua, Gervillia subtortuosa, Ino- 

 ceramus incurvus, and Ostrea patina; from the Great Bend of the Mis- 

 souri, Nucula obsoletastriata. 



From (the Fox Hills Group) f No. 5, of the Cretaceous in Nebraska, 

 iScalaria cerithiformis, now Chernnitzia ceri.thiformis, Natica am- 

 bigua, now Vanikoro ambigua, Natica occidentalis, now Lunatia occi- 

 deixtalis, Turbo tenuilineatus, now Spironema tenuilineatum, Fusus 

 dakotensis, F. galpinanus, now Fasciolaria galpinana.^ F. contortus, 

 F. flexuocostatus, now Fasciolaria flexuocostata^ F. newberryi, now 

 Pyrifusus newberryi, F. culbertsoni, now Fasciolaria culbertsoni, Py- 

 rula bairdi, now Pyrop)sis bairdi, Fasciolaria cretacea, F. buccinoides, 

 Buccinum nebrascensis, now Pseudo-buccinum nebrascense. Bulla vol- 

 varia, now Cylichna volvaria, B. minor, now Ilaminea minor, Turri- 

 tella moreaucnsis, now Cerithiopsis moreauensis, Belemnitella bulbosa. 



From the mouth of Judith river, on Cherrj^ creek, and on Moreau 

 river, Pholadomya undata, now Cymella undata, Goniomya americana, 

 Solen subplicatus^ now Solenomya subplicata, Tellina gracilis, now 

 Thracia gracilis, Tellina Cheyennensis, T. scitula, T. subelliptica, now 

 Corbicula subelliptica, T. prouti, now Thracia prouti, Cytherea de- 

 weyi^ now Callista deweyi, Cytherea nehrascensis, now Callista nebras- 

 censis, Corbula moreauensis.^ now Neaera moreauensis, C. ventricosa, 

 now iV^. ventricosa, C. gregaria, now Corbitlamella gregaria, Astarte 

 gregaria, now Eryphyla gregaria, Nucula scitula, now Toldia scitula, 

 N. evansi, now T. evansi, N. (p.quilateralis, now Nuculana cequilater- 



* Proc. Acad. Nat. Sci., vol. 8. 

 t Proc. Acad. Nat. Sci., vol. 8. 



