282 
TESTUDINID~. 3 
lip is not well differentiated, being narrow, pointed, and not projecting beyond the rim of the 
carapace. The extremity is considerably thickened; but the borders are rather acute. The 
entoplastron has a width of 150 mm. Its 
hinder border can not be exactly traced, but 
the form of the bone has apparently been 
nearly circular. 
The bridge has a width of 281 mm., being 
therefore a little more than four-tenths of the 
length of the plastron. 
The hinder lobe has a length of 202 mm. 
Its width is 309 mm. Its dimensions are there- 
fore the same as those of the front lobe. The 
hinder extremity was notcht, but the angles 
on each side of the notch may not have been 
so acute and long as shown in the restoration 
and the figure. 
The arrangement of the scutes is not, so 
far as can be determined, greatly different 
from that of other Testudinide. The gulars 
do not encroach on the entoplastron. The 
humero-pectoral sulcus runs straight across 
the plastron (not touching the entoplastron ) 
until it approaches the axillary notches, when 
it turns abruptly forward. The pectoral 
scutes are very narrow, about 22 mm. at the 
midline, but they widen right and left. The 
abdominal scutes extend fore and aft a great 
distance, about 242 mm., this length being 
contained in the length of the plastron two 
and a half times. The femoral scutes have 
an extent of 56 mm. along the midline. There were evidently inguinal scutes; but no axillary 
scutes have been observed. The sulci between the plastral and the marginal scutes at the 
bridges appear to have lain on the plastral bones, near the sutures between the plastral and 
the peripheral bones. 
The figure publisht in the Proceedings of the U.S. National Museum, vol. xx11, plate iy, is 
eight forty-hfths the size of the original, instead of one-seventh as stated on the plate. The 
diagrammatic figure forming plate v of that publication 1s 19 hundredths the natural size. 
Fic. 481.—Hadrianus schuchertt. Plastron. 
From type in U.S. N. M. 
Genus ACHILEMYS nov. 
An imperfectly known genus of the Testudinide. Carapace with recurved hinder periph- 
erals. Sulcus between the fifth vertebral scute and the supracaudal crossing, as in Stylemys, 
on the last suprapygal. Plastron with a broad, extremely short lip, which is obtuse and which 
does not thicken backward on the upper surface as it does in other Testudinide. 
Type: Hadrianus allabratus Cope. 
Achilemys allabiata (Cope). 
Figs. 482-485. 
Hadrianus allabiatus, Cort, Proc. Amer. Philos. Soc., xu, 1872, p. 4713 6th Ann. Report U. S. Geol. 
Surv. Terrs. (Hayden), 1872 (1873), p. 630; Vert. Tert. Form. West, 1884, p. 140, plate xv, figs 
13-15.—Ossorn, Scott, and Speir, Contrib. Mus. Geol., Archzeol. Princeton College, No. 1, 1878, 
p. 94.—Hay, Bibliog. and Cat. Foss. Vert. N. A., 1903, p- 450; Amer. Geologist, Xxxv, 1905, 
P- 333- 
The type of the present species belongs to the U. S. National Museum and bears the 
number 4054. It consists of the right half of the front lobe of the plastron, 2 anterior periph- 
erals, 3 hinder peripherals, a portion of the pygal, and a portion of the last suprapygal. It 
