Mesozoic and Ccenozoic Geology and Palaeontology, 223 



preservation. The stump stratinn exists, at about tlie same level, over 

 all the Delta plain of the Mississippi and along the Gulf coast from 

 Mobile, on the east, to the Sabine river. 



Dr. Joseph Leidy* described, from the White River Group of Dakota, 

 Oreodon aJjUnis, O. bullatus, 0. hyhrldus, Leptauchenia nitida, Homo- 

 camelus caninus, Cosoryx furcatus, Nanohyus porcinus, Protohippus 

 placidus, Hipparion affi,ne, and H. gratum. He described from the 

 Eocene near Fort Bridger, Wyoming,t Omomys carteri, Trionyx 

 guttatus, Emys tayomingensis, and from South Bitter creek, near 

 where it crosses the stage route, 70 miles west of the summit of 

 the Rock}' mountains, in western Wyoming, Crocodilus aptus. 



Prof E. D. CopeJ described, from the Miocene of Shiloh, Cumber- 

 land county. New Jersey, Tretosphys urceiis, Zarhachis velox, and 

 Trionyx lima ; from the mouth of the Patuxent river, Maryland, 

 Zarhachis tysoni. 



He described, § from the Eocene marl pits, at Shark river, Monmouth 

 county, N. J., Hemicaulodon effodiens; from Farmingdale, Myliohates 

 glottoides, and Cmlorhynchus acus; from the Green River Group, on 

 the upper waters of Green river, Wyoming, Asineops squamifrons, 

 Clupea pusilla, Gyprinodon levatus; from the Miocene in Wayne 

 count}'', North Carolina, Pneumatosteus nahunticus; from Duplin 

 county, Pristis attenuatus; from Edgecombe county, Eschrichtius 

 polyporus; from Quanky creek, Halifax count}'', Mesoteras kerranus; 

 from Stafford county, Va., Thinotherium annulatum. 



He described, from the Post-pliocene, at Savannah, Georgia, Anoplo- 

 nassa forcipata; from cave Breccia, in Wythe county, Virginia, Tamias 

 IcBvidens, Sciurus panoUus, and Galera perdicida. 



Prof O. C. Marsh| described, from the Eocene, near Shark river, 

 Monmouth county. New Jersey, Dinophis grandis. 



T. A. Conrad^ described, from the same locality, Pecten kneiskerni, 

 Crassatella littoralis, Crassina veta, Bucardia veta, Caryatis dela- 

 loarensis, Protocardia curta, Onustus amiosus, and Terebratula glossa. 

 And from the Miocene of St. Charles county, Maryland, and from 

 Petersburg, Va., Pecten cerimis, Callista virginiana, Saxicava insita, 

 Scapharca tenuicardo, M ercenaria plena, and Capsa parilis. 



* Jour. Acad. Nat. Sci., vol. vii. 



f Proc. Acad. Nat. Sci. 



X Proc Acad. Nat. Sci. 



§ Proc. Am. Phil. Soc, vol. xi. 



II Am. Jour. Sci. & Arts, 2d series, vol. .xlviii. 



IT Am. Jour. Conchology, vol. v. 



