142 



MEMOIRS OF THE CARNEGIE MUSEUM 



course of the costo-peripheral suture whereas in the former it crosses the peripherals 

 on their upper third. 



12. Echmatemys pusilla? Hay. 

 Echmatemys pusilla Hay, Fossil Turtles of North America, 1908, pp. 337-339, 

 text-figs. 445, 446. 



A small turtle, C. M. No. 3282, collected by Messrs. Earl Douglass and 

 Clarence Wilson, November 1, 1911, southeast of Ouray, Uinta County, Utah, 

 from Horizon C of the Uinta formation, Upper Eocene, is referred with some doubt 

 to Echmatemys pusilla Hay. The very fragmentary nature of the present specimen 

 renders its generic and specific affinities difficult of positive determination, but after 

 a careful comparison of this specimen with the type of E. pusilla, kindly loaned me 

 by Dr. W. D. Matthew, of the American Museum of Natural History, I am con- 

 vinced of the very close relationships of the two specimens, even though the dis- 

 covery of more perfect material may eventually demonstrate their specific distinct- 

 ness. 



Fig. 17. Portions of the carapace and plastron of Echmalemya -pimllal Hay. C. M. No. 3282. (1), 

 plastron; (2), carapace. c2, c3, costals two and four; n2, nS, neurals two and five; v2, vertebral scute two. 

 Natural size. 



This specimen consists of the anterior lobe of the plastron lacking the lip, a 

 small portion of the carapace consisting of the second neural complete, and portions 

 of the third, fourth, and fifth neurals with the upper portions of abutting costals, 

 as shown in Fig. 17. The second neural is hexagonal in outline and measures 9.5 

 mm. in length, with a greatest width of 10 mm.; the third is 12 mm. long and 13 

 mm. wide; the fourth is 13 mm. long. The second vertebral has its greatest width 

 of about 35 mm. at the center. The scutal areas of the carapace are plainly grooved 

 by the lines of growth of the scutes. These lines of growth are also present in the 

 type of the species. 



