300 FOSSIL TURTLES OF NORTH AMERICA. 
height, or extent at right angles with the free border, was about 45 mm. The eighth peripheral 
had a length along the free border of 41 mm. and a height of about 60 mm. The pygal had 
a height of 30 mm. and a width of 35 mm. It was moderately recurved and transversely 
convex above. 
The sulci bounding the horny plates are well markt. Professor Cope describes the first 
vertebral scute as being longer than wide, the second as long as wide, the third a little wider 
than long, the fourth still wider; but a study of his figure does not in all respects confirm this 
statement. The dimensions in the accompanying table are estimated from his figure, as the 
bones of the carapace are now in a disturbed condition. 
The costo-marginal sulci have pursued their course considerably below 
the costo-peripheral sutures. 
Professor Cope states that the length of the plastron (fg. 376) was 
290 mm., and the specimen confirms the statement. He also informs us 
a t that the bones were not thick; but no measurements are given. The ante- 
65 ( rior lobe had a length of about 85 mm. and a width of about 140 mm. at the 
50 (67 base. Cope’s measurements are somewhat greater than those here given. 
5? 95 The anterior lip projects somewhat beyond the general curvature of the 
lobe and is truncated. Seen from above the lip is very concave from side 
to side and spout-shaped (fig. 377). On each side is a rather deep cleft which separates from 
the remainder of the lip a rather prominent tooth. The thickening on the upper side of the lip 
extends backward about 35 mm. At the hyoepiplastral suture the beveled horn-covered 
surface has a width of about 25 mm. 
The entoplastron has a length of 42 mm. and a width of 55 mm. Its thickness is 13 mm. 
The bridge is about 110 mm. wide. 
The length of the hinder lobe is 105 mm., 85 mm. along the midline; its width is 140 mm. 
There is a posterior notch which has a width of 38 mm. and a depth of 20mm. The beveled 
horn-covered surfaces on the upper side of the hinder lobe (fig. 378) have a width, at the 
hypoxiphiplastral suture, of 27 mm. 
At the crossing of the median longitudinal and the hyohypoplastral sutures the bones are 
1o mm. thick. The greatest thickness of the epiplastrals is 16 mm. The inner border of the 
beveled area, just behind the inguinal notch, is 13 mm. 
The inguinal buttress begins to rise from the floor of the plastron at a line not quite half- 
way from the free border of the lobe to the midline. 
The gular scutes are 53 mm. long; the humerals, 32 mm.; the pectorals, 41 mm.; the 
abdominals, 66 mm.; the femorals, 45 mm.; the anals, 34 mm.; all measured along the mid- 
line. The humero-pectoral sulcus falls slightly behind the entoplastron, resembling in this 
respect E, shaughnessiana (Cope). However, in one of Cope’s specimens the sulcus crept 
over on the posterior margin of the entoplastron. It is not certain, on the other hand, that this 
specimen (Cope, Wheeler’s Survey, 1v, plate xxvii, fig. 3) belongs to the present species. 
Cope collected altogether five specimens of this turtle, two of them larger than the type, 
and one much smaller. The latter showed traces of a median carina on some of the neurals. 
Scute. Length. Width. 
AP Wwe 
Echmatemys cibollensis (Cope). 
Text-fig. 379- 
Emys (2)stevensonianus, Cope, Syst. Cat. Vert. Eocene New Mexico, Report to Engineer Dept. U. S. 
Army, 1875, p. 36. 
Emys stevensontanus, Core, Ann. Report Chief Engineers for 1875, Append. LL, p. 995 (of reprint, 75). 
Emys ctbollensis, Corr, Wheeler’s Surv. W. 1ooth Merid., vol. 1v, part li, p. 57, plate xxvii, fig. 4; 
plate xxviil, figs. 3-6.—Hay, Bibliog. and Cat. Foss. Vert. N. A., 1902, pp. 447. 
The figured specimen of the type of this species belongs to the U. S. National Museum and 
has the catalog number 2576. The carapace appears to be missing. Cope states that the 
species was based on a single imperfect individual, in which some of all the characteristic 
parts were present, except the neurals. Of the parts in his possession Cope figured the epi- 
plastral lip, as seen from above and from below; the border of the hinder lobe, as seen from 
above; and two peripheral bones, 
