334 FOSSIL TURTLES OF NORTH AMERICA. 
‘This species appears to be most closely related to E. ocyrrhoé. In E. egle, as compared 
with £. ocyrrhoé 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. egle is 
more acute and the bones are not so thick. As shown by the specimens, the eighth peripheral 
of E. eagle is only 12 mm. thick where it joins the seventh, whereas in £. ocyrrhoé it is 17 mm. 
thick. In the second specimen of EF. egle the thickness of this bone is 15 mm. In E. ocyrrhoé 
the inguinal scutes did not reach the sixth marginals. As compared with E£, ocyrrhoé, 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 9g mm. thick in £. egle, 11 mm. in FE. ocyrrhoé, No. 5954; the latter 
being, besides, a smaller individual. In FE. egle, No. 5976, the thickness of peripherals one and 
two at their articulation is 12 mm.; in F. ocyrrhoé, 17.5. 
E. egle resembles E. naom: in the form of the vertebral scutes, but is distinguisht there- 
from by numerous characters. 
No. 10073 of 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. 
Fics. 440 AND 441.—Echmatemys egle. Carapace and plastron. XX}. 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 of 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. ; 
