179 



PISCES. 



LITERATURE OF THE SUBJECT. 



1856. Leidy, Proceedings Academy Philadelphia, p. 73. Lepidotus- from 



Judith River. 



Leidy, /. c, p. 256. Two species of Enchodus and Cladocyclus de- 

 scribed. 



Leidy, /. c, p. 312. Mylognathus prisms, from the Fort Union epoch, 

 described. 



1857. Leidy, /. c, p. 167. Phasganodus dirus described. 



1858. Marcou, North American Geology, p. 33. Ptychodus ivhippleyi de- 



scribed. 

 1868. Leidy, Proceedings Academy, Philadelphia, p. 207. Ptychodus occi- 

 dentalis described. 



1870. Leidy, I. c, p. 12. Xiphactinus audax described. 



Cope, Proceedings American Philosophical Society, p. 529. Family 

 of Saurodontidcd established and defined, and one new genus and 

 four new species described. 



Cope, Hayden's Report on Geological Survey of Wyoming, p. 424. 

 Apsopelix sauriformis described. 



1871. Cope, Proceedings American Philosophical Society, p. 170. Genera 



Portheus and Anogmius described. 



1872. Cope, /. c, p. 327. Descriptions of twenty species and nine genera; 



characters of latter and of families Saurodontidce and Strato- 

 dontid(B extended. 

 Cope, Proceedings Academy, Philadelphia, 280. Erisichthe nitida 

 described. 



1873. Leidy, Vertebrate Fauna of Western Territories, in Hayden's Report 



of United States Geological Survey, vol. I, p. 288. Twelve known 

 species redescribed and figured. 

 Cope, Proceedings Academy Philadelphia, p. 337. Portheus lestrio and 

 P. gladius described, and genus Daptinus defined. 



1874. (April.) Cope, in Hayden's Bulletin of United States Geological Survey 



of the Territories, p. 39. Synopsis of all the species ; ten added ; 

 genus Empo more fully defined. 



