GILMORE: the fossil turtles of the UINTA FORMATION 143 



The entoplastron, as in the type, is long, narrow, and pointed in front. Its 

 greatest length is 19 mm., its greatest width 16 mm. It is overlapped by both the 

 gulars and pectorals. The specimen before me also agrees with the type in the 

 great width of the pectorals behind the entoplastron. These scutes reach backward 

 to the hypoplastral suture, a condition not known in any other species of the genus. 

 At the point where the pectoro-humeral sulcus crosses the free borders the lobe 

 has a width of 48 mm. The free border of the lobe is thin and acute, being bevelled 

 off on the upper surface. 



The most important dissimilarity between the two specimens here discussed 

 appears to be in the wide vertebrals and in the shape of the neurals, those of the 

 type having the postero-lateral angles truncated, whereas in the specimen from 

 the Uinta formation the antero-lateral angles of the third, fourth, and fifth are 

 thus cut off. The second neural is octagonal in the type, hexagonal in No. 3282. 

 In the shape of the anterior lobe of the plastron, the long pointed entoplastron 

 overlapped by the gulars and crossed well forward by the pectoro-humeral sulcus 

 and the extremely wide pectorals reaching backward nearly to the hyo-hypo- 

 plastral suture these specimens show a remarkably close resemblance. 



Family TESTUDINID^ Gray. 



The family Testudinidse is represented in the collection of chelonian remains 

 from the Uinta formation in the Carnegie Museum by the two genera Hadrianus 

 Cope and Testudo Linnseus. the former genus by three, the latter by but one species. 

 Four species of Hadrianus are now recognized as occurring in the Uinta formation. 

 The discovery of Testudo in the Upper Eocene is of interest as being the first time 

 this genus has been found below the Oligocene in North America. In the Fayum 

 deposits (Upper Eocene) of northern Africa, however, the genus Testudo has been 

 recognized by Andrews from well-preserved specimens, which in several respects 

 closely resemble the species here described. 



Genus Hadrianus Cope. 

 13. Hadrianus corsoni (Leidy). 

 Plate XXV, fig. 1; text-fig. 18. 



Testudo corsoni Leidy, Proc. Acad. Nat. Sci. Phila., 1871, p. 154; Contrib. Extinct 

 Vert. Fauna West. Terrs., 1873, pp. 132, 339, PI. XI, figs. 1, 2; PI. XV, fig. 7; 

 PL XXIX, figs. 2-4; PL XXX, figs. 1-4. 



Hadrianus octonarius Cope, Palseont. Bull. No. 2, 1872; Vert. Tert. Form. West., 

 1884, p. 140, PL XX, figs. 1-4. 



