334 



FOSSIL TURTLES OF NORTH AMERICA. 



This species appears to be most closely related to E. ocyrrhoe. In E. cegle, as compared 

 with E. ocyrrhoe the vertebral scutes are wider and more distinctly urn-shaped, the neurals are 

 broader, the carina over the bridge, on the peripherals, appears to have been more angular, 

 the beveled areas on the upper side of the epiplastron are somewhat wider; those on the upper 

 side of the hind lobe are considerably wider. The front border of the carapace of E. cegle is 

 more acute and the bones are not so thick. As shown by the specimens, the eighth peripheral 

 of E. cegle is only 12 mm. thick where it joins the seventh, whereas in E. ocyrrhoe it is 17 mm. 

 thick. In the second specimen of E. regie the thickness of this bone is 15 mm. In E. ocyrrhoe 

 the inguinal scutes did not reach the sixth marginals. As compared with E. ocyrrhoe, No. 

 5954, the rib-heads are much stouter, the diameters of the former being about 10 mm.; in the 

 latter about 8 mm. The thickness of the first costal plate at the angle where it joins the nuchal 

 and the first peripheral is 9 mm. thick in E. cegle, 1 1 mm. in E. ocyrrhoe, No. 5954; the latter 

 being, besides, a smaller individual. In E. <Egle, No. 5976, the thickness of peripherals one and 

 two at their articulation is 12 mm.; in E. ocyrrhoe, 17.5. 



E. cegle resembles E. naomi in the form of the vertebral scutes, but is distinguish! there- 

 from by numerous characters. 



No. 10073 f the paleontological collection of Princeton University appears to belong to this 

 species. Its length is close to 300 mm., the width, 215 mm. The center of the carapace is 



440. 



441. 



FIGS. 440 AND 441. Echmatemys cegle. Carapace and plastron. Xj. No. 11515 



Princeton University. 



440. Carapace. 441. Plastron. 



missing, removing most of the neurals and vertebral scutes. The first vertebral is 55 mm. 

 long, 78 mm. wide in front, 36 mm. behind. The fourth vertebral is 70 mm. wide where 

 widest contracting behind to 27 mm. The fifth had a maximum width of 64 mm. 



The anterior lobe of the plastron contracts very little from the axillary notches to the 

 hyoepiplastral suture; then rapidly to the lip. There is a sharp notch at each side of this. 

 No. 11515 (figs. 440, 441) of Princeton University, lacking the hinder part of the shell, appears 

 to belong here. The nuchal scute is 80 mm. wide near the front, narrows to 64 mm., widens 

 again to 70 mm., then narrows to 43 mm. at the hinder end. The other vertebrals are expanded 

 at the middle of the length. The sulci are deeply imprest. The length from the front of the 

 carapace to the hinder border ot the sixth neural is 255 mm. The axillary and the inguinal 

 buttresses are strongly developt, rising high on the inside of the carapace. The former extends 

 inward from the free border of the anterior lobe about 25 mm. The inguinal buttresses extend 

 inward from the free border of the hinder lobe 32 mm. They articulate with the fifth and 

 sixth costals. 



