EMYDID^i. 



339 



all was secured, except the right hyoplastron, a small part of the right hypoplastron, and the 

 whole xiphiplastron. 



The length of the carapace was not far from 1 10 mm. There is a sharp keel on the nuchal. 

 This is carried back on the neurals, but is obtuse until the seventh is reacht. On this, but 

 especially on the eighth and on the suprapygals, it is sharp. The neurals are broad, as in the 

 type. The third, not the second, is octagonal. The seventh is 6 mm. long and 12 mm. wide; 

 the eighth, 6.5 mm. long and 1 1 mm. wide, and is crost by the sulcus between the fourth and 

 the fifth vertebral scutes. The first suprapygal is 8 mm. long on the midline, 6 mm. wide in 

 front and 10 mm. behind; and is deeply excavated behind for the second suprapygal. This 

 is small, only 5 mm. long and J mm. wide. 



The plastron has a total length of 103 mm. The anterior lobe is 30 mm. long and 54 mm. 

 wide at the base. The epiplastral lip is 24 mm. wide, acute-edged, extends backward on the 

 upper side 13 mm., and is 6 mm. thick. The upper surface is quite strongly imprest by the 

 lines of growth of the horny scutes. The axillary buttresses extend but a little distance within 

 the free borders of the base of the lobe. The entoplastron is long and narrow, as in the type, 

 being 22 mm. long and 18 mm. wide. The bridge is 36 mm. wide. 



The hinder lobe is 35 mm. long and 55 mm. wide at the base. In the rear there is a rather 

 deep notch. The free borders are acute. On the upper side, at the hypoxiphiplastral suture, 



the horn-covered surface is 10 mm. wide. Here the 

 bones are 5 mm. thick. The inguinal buttress extends 

 inward about one-third the distance from the free bor- 

 der of the lobe to the midline. 



The sulci are very distinct. The dimensions of the 

 vertebral scutes are given in the table herewith. 



The gulars barely reach the entoplastron. The 

 humero-pectoral sulcus crosses at about the middle of 

 the length of the entoplastron. As in the type, the pec- 

 toro-abdominal sulcus is carried back nearly to the hyohypoplastral suture. The femoro- 

 abdominal sulcus crosses the lobe in a nearly straight line. The femorals measure along the 

 midline, 19 mm.; the anals, 13 mm. 



This species resembles in several respects Clemmys morrisice. It differs, however, in having 

 the free borders of the second and third peripherals acute, instead of obtusely rounded, and in 

 having the inguinal buttresses rise well within the free border of the plastron. The epiplastral 

 lip resembles in form closely that of C. morrisicE, and it is markt on its upper surface with 

 similar ridges, though not so strongly developt. 



Echmatemys? latilabiata (Cope). 



Emys latilabiatus, COPE, Proc. Amer. Philos. Soc., XII, 1872, p. 471; Sixth Ann. Report U. S. Geol. 



Surv., 1872 (1873), pp. 625, 626; Vert. Tert. Form. West, 1884, p. 138. 

 Emys latilabiata, HAY, Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 448. 



The present species has never been figured. In his work on the Vertebrata of the Tertiary 

 Formations of the West, cited above, Professor Cope stated that the type had been mislaid. 

 So far as the present writer knows, it has not been recovered up to the present time. It is 

 possible that at some time another specimen may be discovered that can be identified by 

 means of the description. The striking characters of the species, so far as indicated by Cope's 

 description, are the relatively great breadth of the shell and the wide epiplastral lip. The 

 following is Cope's latest description : 



Represented by a perfect specimen of a tortoise of a broadly oval form, and somewhat terrestrial 

 habit. Its prominent characters are to be seen in the plastron, of which the posterior lobe is deeply 

 bifurcate. The anterior lobe is peculiar in the unusual width of the lip-like projection of the clavic- 

 ular ("episternal") bone, which is twice as wide as in E. wyomingensis, and not prominent. Bones 

 all smooth; margins of lobes of plastron thickened. 



There are three scars, perhaps, of muscular insertions near the posterior margin of the plastron, 

 an oval one opposite to each lobe, and a round one opposite to the notch. 



As compared with E. septana this species has no such septa nor sculpture; the emargmation of 

 the plastron is more open, and the lip much shorter and wider. 



