TESTUDINIDJE. 



44.-! 



1'lie pel\ is i figs. 590 a, b) is represented by the greater portion of the left side. The lateral 

 process of the pubis is rather short, flat, and broad and rounded at the end. The tuber ischii 

 is rather slender and pointed. 



No. 1325 of the American Museum is likewise a part of the Cope collection. It was a 

 larger animal than the type just described. The length of the plastron is 615 mm. and its 

 width to the outer borders of the bridge peripherals could not have been less than 555 mm. 

 The width ot the carapace at the inguinal notches was 600 mm. Almost the whole of the 

 plastron is present; also considerable parts of the costals and neurals in a fragmentary state; 

 and the greater part of the rim of the carapace, of the shoulder-girdle, of the pelvis, and of the 

 limbs. The plastron differs from that of the type principally in the size and form of the 

 anterior lip. This (tig. 591) is relatively broader, with its sides less converging, less truncate 



in front, and less cari- 

 nated above. Since, how- 

 ever, the two individuals 

 are so closely alike in all 

 other respects and there 

 seems to be a good deal 

 ot variation in the form 

 ot the lip among the var- 

 ious specimens, there is 

 apparently no sufficient 

 reason for regarding No. 

 1325 as belonging to a 

 different species. The 

 width of the lip at the base 

 is 184 mm. Where the 

 curve of the sides into the 

 anterior border is made 

 the width is 150 mm. 

 Instead of being slightly 

 notcht in front, the ante- 

 rior border is broadly 

 rounded. From side to 

 side the upper surface is 

 evenly convex. Figs. 592, 

 593 represent sections of 

 the lip. 



The entoplastron is 163 

 mm. long and 200 mm. 

 wide. The humero-pec- 

 toral sulcus passes just 

 behind its hinder border. 

 The plastron is rather 

 deeply concave in tront of the hinder lobe, a condition which indicates that the individual 

 was a male. Fig. 2 ot plate ~8 gives a view ot the rear ot the shell seen from below. 



Of the anterior portion of the carapace only peripherals 1, 2, and 3 are present. They 

 differ in no important respect from the corresponding elements of the type. Almost the whole 

 of the posterior rim is present, the pygal and most ot the peripherals being complete. At the 

 midline the hinder edge of the carapace falls about 120 mm. behind the plastron. The upper 

 portion of the peripherals is nearly perpendicular, but the lower portion is considerably flared 

 outward. The eighth peripheral has a height of 160 mm.; the eleventh, of 120 mm. The 

 second suprapvgal is present, of rhombic form, and about no mm. from side to side. Its 

 lower half is placed in a notch in the pygal. .The sulcus behind the fifth vertebral scute crosses 

 it horizontally in the middle. Costals and neurals too fragmentary to justify description. 

 The left scapula is present in No. 1325. The length of the bone from the superior extremity 

 to the middle of the glenoid fossa is 180 mm.; from the latter point to the extremity of the 



Figs. 594 and 595. TestuJo orthopygia. 

 No. 1325 A. M. N. II. 



Left humerus. X 



^04. Radial border. 



595 



Dorsal surface. 



