256 



Elasmosaurus platyurus, Cope. 



Notes on tbo Geology of the -Southern Division of the Pacific Railroad, by J. Leconto, 1868, 

 p. (58; Extinct Batrachia ami Reptilia of North America, etc., 1869, p. 44; Hayden, 

 Geological Survey of the. Territories, 1870, Wyoming, p. 393. — Discosaurus carinatus, 

 Cope, Leconte's Notes, 1. c. 



Niobrara Cretaceous of Kansas. 



PLESIOSAURUS, Conybeare. 



Plesiosaurus lockwoodii, Cope. 



Extinct Batrachia and Reptilia of North America, 1869, p. 40. 



Cretaceous clays, No. 1, New Jersey. 

 Plesiosaurus brevifemur, Cope, sp. nov. 



Cimoliasaurus magmis, Leitly, Cope, part : Extinct Batrachia and Eeptilia of North America, 

 1869, p. 43 ; figs. 13-15, p. 41. 



Greensand of No. 5, New Jersey. 

 Plesiosaurus gulo, Cope. 



Proceedings of the Academy of Philadelphia, 1872, 1'28. 



Niobrara Cretaceous of Kansas. 

 Plesiosaurus occiduus, Leidy. 



Xothosaurus occiduus, Leidy, Proceedings of 1bc Academy of Philadelphia, ]S70, p. 74 ; 

 Report of the Geological Survey of I lie Territories (4to). 1873, I, p. 34r>, Table 

 XV, rigs. 11-13. 



Lignite Cretaceous of Moreau River, Dakota. 

 ISCHYROSAURUS, Cope. 



Extinct Batrachia and Reptilia of North America, 18B9, p. 33. — Itscliyrotlicrium, Leidy, Pro- 

 ceedings of the Academy of Philadelphia, 1856, p. 89 : Transactions of tlic American 

 Philosophical Society, 1860, p. 150. 



ISCHYROSAURUS ANTIQUUS, Cope, /. /:. 



lachyrotherium antiquum, Leidy, /. c. j Transactions of the American Philosophical Society, 

 I860, Table X, figs, B-17. 



Lignite period between .Moreau and Grand Rivers, Nebraska. 



TESTUDLNATA. 

 PROTOSTEGA, Cope. 



Proceedings of the American Philosophical Society, 1871. p. 17." : /. <■., 1^70, )>. 4iJ2. 



Pkotostega gigas, Cope, /. c. Plates X. XL XII, XIII. 

 From the Niobrara Cretaceous of Kansas. 



