712 



REPORT OF NATIONAL MUSEUM, 1902. 



fourth vertebrals much longer than the anterior and posterior sutures; 

 vertebrals much narrower than costals; posterior margin of carapace 

 slightly serrate, each of four posterior marginals on each side being 

 faintly emarginate; carapace broader behind than in front, the posterior 

 marginals flaring out considerably; plastron less than two-thirds and 



184 183 



Figs. 180-184.— Pseudemys palustris, young. 180, shell from above; 181, shell from below; 182, shell 



from side, i natural size. 183, top of head. 1} x natural size. 184, upper side of fore foot. Natural 

 size. No. 25643, U.S.N.M. 



more than one-half the greatest width of the carapace; the posterior 

 lobe a trifle wider than the anterior, its length much less than the 

 width of the bridge; abdominal suture longest, equaling those of the 

 pectorals and femorals together; humeral suture shortest; gulars pro- 

 jecting, cut off square anteriorly; plastron slightly emarginate behind; 



