EMYDIDiE. 



299 



The known remains of this species were collected in the Wasatch beds of northern New 

 Mexico and were at first referred by Cope to his species Emys latilabiatus ot the Bridger beds. 

 The specimens mentioned by Cope are at present in the U. S. National Museum and have been 

 examined by the writer. 



The type specimen, that figured by Cope, was restored from loose fragments, and various 

 portions were missing. The length of the restored carapace (fig. 375) is given as 350 mm. 

 It follows from this that Cope's figure is not half the size of nature, as is stated, but somewhat 



less. The width was close to 284 mm. The front was broad and 

 rounded, the rear nearly truncate. The neurals are characterized 

 by their great breadth as shown in the table herewith. 

 The first suprapygal is 35 mm. long and 29 mm. wide. 

 On none of the neurals is there any trace of a median keel. 

 The first pygal was 35 mm. long and 29 mm. wide. The second 

 appears to have been about 21 mm. long and 49 mm. wide. 

 The nuchal bone had a width in front ot about 58 mm. 



The costal bones presented no considerable differences in 

 the widths of their opposite ends. They are devoid of sculpture. 

 One of them, probably the third, had a width of 24 mm. in the 

 middle of its length and a thickness of 5 mm. On the inner 

 surface of the first and near to its peripheral border is a short articular surface for the reception 

 of the axillary buttress. This surface shows that the buttress did not ascend so high as did 

 that of some species of the genus. Above the scar for the buttress is a low ridge, that per- 

 taining to the rib of the first costal. 



377- 



.?7. 



Figs. 375-378. Echmatemys lativertebralts. Carapace and plastron of type. Xj. 



375. Carapace. Restored portions shown by interrupted lines. 376. Plastron. 377. Epiplastral lip, upper surface. 

 378. Right side and upper surface of hinder lobe of plastron. 



The inguinal buttress articulated with the filth and sixth costals. As stated by Cope and 

 shown by the type, the buttress ascended about two-fifths the distance from the lower border 

 of the costal to the upper border. 



The free peripheral bones are large, thin, and recurved. The second and the eleventh are 

 flared the most. The peripherals of the bridge were not crost by a sharp keel running from 

 the anterior to the posterior free peripherals, a condition regarded as showing that the shell 

 was not deprest. The first peripheral had a length of 48 mm. along the free border. Its 



