126 



MEMOIRS OF THE CARNEGIE MUSEUM 



has the surface of the carapace smooth, with the exception that, as in the type of 

 E. septaria, it is relieved by faint striations and growth lines, these being especially 

 apparent within the areas of the vertebral scutes. 



Meastjhements of Neurals. 



Measurements of Vertebrals. 



Principal Measurements Carapace and Plastron. 



Greatest length of carapace 



Greatest wdth of carapace 



Greatest height of carapace 



Nuchal, greatest length 



Nuchal, greatest width 



First marginal, greatest length. . 

 First marginal, greatest height. . , 



Plastron, greatest length 



Anterior lobe, greatest length. . . . 



Anterior lobe, width at base 



Posterior lobe, greatest length. . . 

 Posterior lobe, width at base . . . . 



Bridge, width 



Lip, width 



Entoplastron, width 



Gulars, meet on the midline 



Humerals, meet on the midline . . 

 Pectorals, meet on the midline . . 

 Abdominals, meet on the midline 

 Femorals, meet on the midline . . 

 Anals, meet on the midline 



Type. 



438 



270 



153 



68 



90 



40 



32 



410 



116 



174 



135 



198 



155 



38 



52 



72 



35 



74 



110 



38 



No. 2157. 



420 d 



276 



160 

 69 

 86 

 43 

 34 



422 



125 



180 



140 



205 



165 

 44 

 66 

 67 

 34 

 76 



114 

 41 

 62 



No. 2371. 



415 



279 



133 



66 



80 



40e 



28 



370 



107 



176 



195 

 162 

 45 

 75 

 58 

 36 

 73 

 102 

 33 



Had E. callopyge not been established, I should have unhesitatingly referred 

 both of the specimens discussed above to Echynatemys septaria (Cope). For the 



