OS2 



The Reptiles of the An 



Eocene. [December, 



The first known American species {Palcsophis littoralis and P. 

 halidanas) were determined by myself from New Jersey speci- 

 mens. None have been procured from beds lower than the 

 Bridger, and in that formation I found a single form. Professor 

 Marsh described five species. 



Species of the genus Palaophis occur in the Eocene of Eng- 

 land. They are supposed by Owen to be related to the Peropo- 

 dous or Boaeform families. They reached as large a size as the 

 largest existing snakes. Other smaller Eocene species are said 

 to have similar affinities. 



frontal ; pof, post-frontal ; pa, pai 

 -ate; qj, quadratojugal. (Origin 



Crocodilia. 

 The fauna of the Eocene periods of the United States included 

 a number of species of Crocodilia, some of which were repre- 

 sented by great numbers of individuals. They were equally 

 numerous in the Wasatch and Bridger epochs, but none have 

 been found in the Green River formation proper. They are 

 moderately abundant in the Wind River beds, and a species is 



