HERPETOLOGY OF PORTO RICO. 



713 



axillars and inguinale large, latter largest; head moderate; snout 

 short, pointed, feebly projecting; upper jaw with a very slight median 

 notch, no cusps; jaws feebly denticulated; alveolar surface broad, 

 with a deep notch behind on the median line; symphysis of mandible 

 as broad as one-half the longest diameter of the orbit; digits connected 

 with broad webs. Color (in alcohol) of carapace above nearly uniform 

 tawny olive; plastron yellowish, w T ith obscure dusky symmetrical 

 sinuous markings all over; top of head without markings; yellowish 

 lines narrowly edged with blackish on sides and under surface of head 

 and neck, one from the nostrils crossing the upper jaw obliquely and 

 ending abruptly at the posterior angle of the mandible, another from 



1S5 

 Figs. 185-186. — Pseudemys Palustris, young. Color pattern of head; 185, underside; 186, side. 



li x natural size. No. 'jr>G-13, U.S.N.M. 



above the nostrils, crossing the eye to the lower posterior edge of the 

 orbit, and thence obliquely down and backward to the corner of the 

 mouth, continuing backward under the tympanum down the side of 

 the neck; two fainter lines, one between the two just described and one 

 above the transocular line, crossing the tympanum; a line on the sym- 

 physis of the mandible bifurcating on the chin and a third median line 

 originating on the chin a short distance behind the fork, the three 

 continuing parallel down the under side of the neck; two similar but 

 wider lines on the upper side of the fore legs and two on the under 

 side of the hind legs. 



Dimensions. 



mill. 



Length of carapace 232 



Width of carapace anteriorly 150 



Width of carapace posteriorly 170 



Height of shell 95 



Width of anterior plastral lobe 90 



Width of posterior plastral lobe 93 



Width of bridge 88 



Width of head 31 



