AET. 10 THE EXTINCT TURTLE TEACHEMYS SCULPTA — GILMORE 



Scute 



Length 



Width 



Vertebral 1 



MillimeieTs 

 53 

 55 

 58 

 53 

 49 



MillimeteTS 

 48 



2 - 



55 



3 __ . 



59 



4 . _ __ 



58 



5 



65 







The plastron is shown in Figure 2 with the missing epi-ento-and 

 xiphiplastral bones restored from related species. The plastron is 

 flat, turning up slightly at the anterior end. Its surface is indistinctly 

 sculptured. The anterior lobe has a width of 132 mm., width of 

 posterior lobe 130 mm. The bridge is 118 mm. wide. The ento- 

 plastron has a greatest transverse diameter of 45 mm. The hyo- 

 plastra at the midline are 70 mm. long; the hypoplastra 81 mm. 

 The pectoral scutes are 36 mm. long at the center; the abdominals 

 74 mm. The pectohumeral sulcus passes 4 mm. posterior to the 

 entoplastron. 



In the ornate sculpturing of the carapace, the alternate widening 

 and narrowing of the costal plates, and the costo-marginal sulci run- 

 ning well below the peripheral sutures, except on the pygal, Trachemys 

 sculpta has its closest resemblances in the West Indian Pseudemys 

 palustrus. In height of shell, however, the extinct form greatly 

 exceeds any of the living species of Pseudemys except P. ornata. 



