GILMORE: the fossil turtles of the UINTA FORMATION 127 



present, however, it will serve all purposes to assign them to the established Uinta 

 species, until the discovery of additional Bridger material shall definitely determine 

 whether two distinct species are represented by this material, or whether E. cal- 

 lopyge Hay shall become a synonym of the earlier described E. septaria (Cope) . 



In order to place on record the variation within the species, some of the prin- 

 cipal measurements of the two specimens hei'e considered as compared with those 

 of the type of the species are given in the preceding table. 



7. Echmatemys uintensis Hay. 



Echmaternys uintensis Hay, Fossil Turtles of North America, 1908, pp. 342, 343. 

 PL LHI, figs. 1, 2. 



The above species is represented in the Carnegie Museum collections by three 

 specimens. The better preserved specimen, C. M. No. 3270, consists of a carapace 

 and plastron, the former lacking a portion of the posterior end and a considerable 

 part of the costals and peripherals of the right side. The plastron is complete. 

 This specimen was collected by Earl Douglass, May 25, 1908, from Red Bluff Wash, 

 on the road from Bonanza to Kennedy's Hole, Uinta Basin, Utah, from Horizon B, 

 "transition beds. First sandstone above red layer," Uinta formation. Upper 

 Eocene. 



The second specimen. No. 2158, consists of a carapace lacking most of the 

 costals and peripherals of the left side, was collected by Earl Douglass, August 22, 

 1908, two or three miles below Well No. 2, from Horizon B, Uinta formation, as 

 exposed in the Uinta Basin, Utah. 



The third specimen, No. 2397, consists of considerable portions of the carapace 

 and plastron of a large individual, both of which are rather fragmentary. This 

 specimen was collected by Messrs. Earl Douglass and J. F. Goetschius, August 17, 

 1908, from Horizon B, "grey beds below red and grey beds," Badlands south of 

 Kennedy's Hole, Uinta County, Utah. 



This species is based upon a beautifully preserved specimen. No. 11,198, in 

 the paleontological collection of Princeton University. It was collected in 1891 from 

 the middle Uinta, on White River, Utah, and until the discovery of the present 

 specimens was the only known representative of the species. 



The specimens before me add but little to our knowledge of the species, but 

 I believe it important to give at this time their principal dimensions as compared 

 with the type in order to show the variations within the species. 



