TESTUDINID^. 



421 



it is probable that the shell has suffered little depression during fossilization. The anterior 

 peripherals are slightly flared upward; the hinder peripherals not at all so. The curvature of 

 the upper surface is everywhere gentle. The species possesses unusually narrow peripherals. 

 The first has an extent, at right angles with the free border of the shell, of 65 mm. The sixth 

 rises from the lateral carina 146 mm. The eleventh measures from the free edge, at the suture 

 between it and the tenth, to the costal suture, 87 mm. The inner thickening of the anterior 

 peripherals extends backward from the free border about 57 mm., and the thickness is about 

 27 mm. The inner thickening of the hinder peripherals continues for about 75 mm. from the 

 free edge, and amounted to about 30 mm. The free edges of the carapace are everywhere 

 acute. 



The nuchal bone extends along the border of the shell 118 mm. and backward along the 

 midline 127 mm. The forms of the neural bones may be seen from the figures. Most of them 

 are hexagonal, but the second and fourth are octagonal. The second and fourth costals are 

 narrow at their proximal ends, very broad at the distal. The third and fifth are narrow 



550. 



FIGS. 550 AND 551. Testudo pansa. Carapace and plastron of type. X J- 

 550. Carapace. 551. Plastron. 



distally and broad proximally, where they each come into contact with 3 neurals. The first 

 suprapygal has the usual bifurcate form, and comes into contact on each side with the eleventh 

 peripheral. The second suprapygal is small, extending along the midline 57 mm. The pygal 

 measures 52 mm. on the midline, 1 10 mm. along the free border. 



The plastron (plate 71, fig. 2; text-fig. 551) is very broad and flat. The exact position 

 of the sutures between the plastral bones and the peripherals of the bridge can not be deter- 

 mined, but they are not far, if at all, mesiad of the sulci between the plastral and the marginal 

 scutes. The length of the plastron in the midline is 715 mm.; to the extremities of the apices 

 of the xiphiplastra, 45 mm. more. The width of the plastron is about 580 mm. The anterior 

 lobe has a length of 195 mm., and a width of 400 mm. at the base. The borders of the lobe are 

 acute. The anterior lip is narrow at the tip, very slightly notcht, and 148 mm. wide at the 

 gular sulci. Superiorly the lip thickens backward for a distance of 80 mm. becoming about 



