100 THE WASATCH AND BRIDGER FAUN^. 



species assigned to this genus, the depth at the first dorsal (the length of 

 the head) entering the total four times. The muzzle is short and the eye 

 large, apparently in consequence of the immaturity of the fish. Radii : 

 Br. 5; D. X — 8; A III — 12. Vertebrae from edge of operculum, D. IX, 

 C. XIV, or from two to four more than in any other Priscacara. The three 

 spinous anals are robust as in other species of the genus, while the first 

 ventral spine is long and strong and deeply ground on the inner side. The 

 numbers of soft rays above given is subject to revision owing to the condi- 

 tion of the specimen. Total length, M , .058. 



From the shales of City Creek Canon, near Salt Lake City, Utah. 

 This specimen indicates a great northern extension of the Manti shales. 



BATRACHIA. 



Remains of Batrachia are rare in North American formations later than 

 the Permian. There are two or three species of Stegocephali known from the 

 Trias, above which formation that order is not known to extend in any coun- 

 try. No Batrachians have been obtained from the Jurassic or Cretaceous 

 systems excepting from the top of the latter, in the Laramie. Here occur 

 the genera Scapherpeton and Hemitrypus Cope. A single specimen from 

 the Eocene is mentioned below, and then wo miss them until the Loup Fork 

 or Upper Miocene, where Anura and salamanders have been found. 



The vertebral column and part of the cranium of a probably incom- 

 pletely developed tailless Batrachian, were procured by Dr. F. V. Hayden, 

 from the fish shales of the Green River ep6ch, from near Green River City, 

 Wyoming. They are not sufficiently characteristic to enable me to deter- 

 mine the relation of the species to know forms. It is the oldest of the 

 order Anura yet discovered, the fossil remains of the known extinct species 

 having been derived from the Miocene and later formations of Europe. 



