AMERICAN NATURAL HISTORY. 



13 



Teschemacher (J. E.). Note on the vegetation of the coal period. 



— Amer. Journ. of Sc. xn. 1851, 438. (93 



Teschemacher (J. E.). Results of the study of the traces of vege- 

 tation in coal. — Proc. Bost. Soc. Nat. Hist. iv. 1851, 78. 



(94 



Yanbell (L. P.). On the distribution of the crinoidea in the 

 Western States. — Proc. Amer. Assoc. Adv. Sc. v. 1851, 

 229. 95 



A. In Proceedings of the Academy of Natural Sciences of 

 Philadelphia. 



Lea (Isaac). On fossil bones of a reptilian quadruped, from Le- 

 high county, Pennsylvania, v. 1851, 171 and 205. (96 

 Nov. sp. Clepsysaurus (n. g.) Pennsylvanicus. 



Leconte (John L.). On tertiary fossils from San Diego, Califor- 

 nia, v. 1851, 264. (97 



Leidy (J.). On Palceotherium Prouti, and other bones of vertebra- 

 ta. v. 1851, 170. ■ (98 



Leidy (J.). On fossil tortoises from Nebraska Territory, v. 1851, 

 172 and 173. (99 

 ■Nov. sp. Stylemys (n. g.) nebrascencis. 

 Testudo lata. 

 Emys liexnispkerica. 



Leidy (J.). On fragments of fossil ruminant ungulates from Ne- 

 braska Territory, v. 1851, 237. . (10C 

 Nov. sp. Oreodon priscura. 



Cotylops (n. g.) speciosa. 



Leidy (J.). On fossil cetacean bones from the myocene of Virginia, 

 v. 1851, 308. (101 



Nov. sp. Baloena paloeatlantica. 

 prisca. 



