TESTUDINID^:. 



45 



The plastron shows no especial differences when compared with that of the type. The 

 apices of the xiphiplastron are not notcht, in this way differing slightly from those of the 

 original specimen. 



No. 238 of the Carnegie Museum, Pittsburg, is a third known specimen of this species. 

 It is a complete shell, which was collected by Prof. J. B. Hatcher from the Oreodon beds of 

 the Oligocene, at Warbonnet, Sioux County, Nebraska. The carapace is 375 mm. long 

 and 325 mm. wide. Like the other specimens, it is deprest. When compared with the type 



5 11 



5H- 



512. 513. 



FIGS. 511-515. Testudo laticunea. Humerus, femur, and pelvis of type. X . 



511. Prolimal portion of left humerus. 

 513. Pelvis, seen from left side. /'/, ilium; 

 isch, ischium; pub, pubis. 



512. Pelvis, seen from below. 



514. Left femur, dorsal surface. 



515. Left femur, tibia] border. 



there appear to be no important differences. The sulci run along the summits of low ridges, 

 as in the type. Those of the hinder peripherals end at the free margins of the latter on pro- 

 jecting points. 



The only important feature of the plastron is found in the shape of the anterior lobe. 

 This is more wedge-shaped than in the type specimen, the convexity of the free border, from 

 the axillary notch to the gulo-humeral sulci being much less pronounct. The epiplastral lip 

 is notcht and tootht in front like that of the type. 



Testudo ligonia Cope. 



Figs. 516-525. 



Testudo ligonius, COPK, Palaeont. Bull. No. 15, p. 6, 1873; Synop. New Vert. Tert. Colorado, 1873, 

 p. 19; Ann. Rep. U. S. Geol._and Geog. Surv. Terrs., 1873 (1874), p. 51 1 ; Vert. Tert. Form. West., 

 1884, pp. 762, 766, plate Ixi, figs. 2, 3. HAY, Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 451. 



This species was based on a single imperfect individual, and no others have yet been 

 secured. The type belongs to the Cope collection in the American Museum of Natural 

 History and bears the number 1148. It was collected by Cope in 1873, in the Oreodon beds 

 of the White River deposits, at the head of Horse Tail Creek in northeastern Colorado. It 

 consists of a portion of the nuchal bone, the first and probably the ninth right peripherals, 

 the left epiplastron, a part of the left hyoplastron, and the left hypoplastron in the region of 



