Mesozoic and Ccenozoic Geology and Paloiontology. 227 



Dr. Joseph Leidy* described, from the Bridger Eocene of Wyoming, 

 Anosteira ornata, Hyhemys arenarius, Testudo aorsoni, Emys carteri, 

 Baena undata, Trogosus vetulus, pow Anchippodus vetulus, Sinopa 

 rapax, Palmosyops major, Hyrachyus eximius, Paramys delicatus, P. 

 delicatior, and P. delicatissimus, all now Plesiarctomys, and Mysops 

 minimus. He described from the Miocene of Alkali flats, Oregon, 

 Rlunoceras pacificus^ and from Crooked river, Stylemys oregonensis, 

 now Testudo oregonensis. 



Prof. E. D. Copef described, from the Post-pliocene occurring in a 

 limestone fissure in Chester county, Pennsylvania, M eg along xloxo don, 

 M. sphenodon, M. tortulus, 31. ivheatleyi, Sciurus calycinus, Arvicola 

 speothen, A. tetradelta, A. didelta, A. involuta, A. sigmodus, A. hiati- 

 dens, Erithizon cloacinum, and Praotheriumpalatinum. He described 

 from the Miocene near Tuxtla, Chiapas, Mexico, Prymnetes longiven- 

 ter. 



Prof O. C. MarshJ described, from the Green river basin west of the 

 Rocky Mountains, Boavus agiUs, B. brevis, and B. occidentalis; from 

 the Bridger Eocene of Wyoming, Limnophis crassus, Lithophis sar- 

 genti, Crocodilus djffinis, C brevicolUs, C. grinnelli, C. liodon, C. zipJio- 

 don, now Limnosaurus ziphodon, Glyptosaurus anceps, G. nodosics, G. 

 ocellatus, G. sylvestris, TUanotherium (?) anceps, Lophiodon affinis, L. 

 bairdianus, L. nanus, L. pumilis, Anchitheriam gracile, now (?) Orohip- 

 pus gracilis, Lophiotherium ballardi, Elotherium lentum, Platygonus 

 ziegleri, Hyopsodus gracilis, Limnotherium elegans, L. tyrannus, Sci- 

 uravus nitidus, S. parvidens, S. undans, Triacodon Jallax, Cants mon- 

 tamcs, Vulpavus palustris, and Bubo leptosteus. 



He described from the Miocene at Scott's Bluff, on North Platte 

 river, Nebraska, Amphicyon angustidens; from Northern Colorado, 

 Meleagris antiquus; from Cumberland county, New Jersey,§ Lophio- 

 don validus, now Tapiravus validus; and named, but did not describe, 

 from Wyoming, Aniia depressa, A. newberryana, Lepidosteus glaber, 

 and L. whitneyi. Also from the Pliocene sands, near the headwaters 

 of the Loup Fork river, Nebraska, (||) Platygonus striatus, Arctomys 

 vetus, Geoniys bisulcatus, Aquila dananus; and from Oregon, Platy- 

 gonus Gondoni, and Dicotyles hesp>erius. 



* Proc. Acad. Nat. Sci. 



f Proc. Am. Phil. Soc, vol. xii. 



X Am. Jour. Sci. and Arts, 3d series, vol. i. <fe ii. 



5 Proc. Acad. Nat. Sci. 



(II) Am. Jour. Sci. and Arts, 3d series, vol. ii. 



