KO. 2292. 



NEW FOSSIL TURTLES— QILMORE. 



125 



The first vertebral scute is 71 millimeters long and its anterior end 

 is 57 millimeters wide. The sulci bounding the other vertebrals can 

 not be observed. 



The plastron is rather poorly preserved, lacking the whole of the 

 posterior lobe and much of the right side. The anterior lobe narrows 

 rapidly from the base to the blunt anterior end, as in J., masculinas 

 Wieland. The anterior lobe has a length of about 75 millimeters, a 

 width at the base of 116 millimeters. The epiplastrals are narrow. 

 The entoplastron is broadly rounded behind and pointed in front, as in 

 A. oxysternum (Cope). It measures 42 millimeters in length and 40 

 millimeters in width. The bridge has a width of 90 millimeters. 

 The anterior lobe in front turns up slightly from the level of that 

 portion between the 

 bridges. None of the 

 sulci on the plastron or 

 the sutures posterior to 

 the entoplastron can 

 be made out. 



Seven species belong- 

 ing to the genus have 

 been described, all 

 based on rather frag- 

 mentary materials. 

 Excepting A. oxyster- 

 num (Cope), from the 

 Midway formation of 

 Georgia, all the others 

 have been founded on 

 specimens from the 

 Upper greensand bed. 

 Upper Cretaceous of 

 New Jersey. The pres- 

 ence in Agomi)hus ala- 

 hamensis of three low broad, parallel, longitudinal keels, and with 

 neurals longer than wide appears to distinguish this form from aU other 

 described species. Its much larger size may also prove of assistance 

 in distinguishing this species from A. oxysternum, the species to which 

 the present specimen is m all probability most nearly related. 



Family EMYDIDAE. 



ECHMATEMYS MEGAULAX (Cope). 



Plate 36. 

 In 1872 Copei described the above species, basing it on five or six 

 fragmentary specimens. Portion s of some of these are now in the 



» Sixth Ann. Kept. U. S. Geol. Surv. Terr., 1872 (1873) p. 628. 



Fig. 5.— Anterior half of carapace of Agomphus ala- 



BAMENSIS, NEW SPECIES. TYPE No. 8806, U.S.N. M. C. /, C. 5 

 COSTAL BONES ONE AND FIVE; N. 1, 2, S, 4, NEURAL BONES ONE 



TO four; nu., nuchal bone. One-third natural size. 



