REPTILES 



245 



G. pseudogeographica (Gray). Similar to G. geographica but with 

 a more distinct keel; median row of plates imbricated and each with a 

 high tubercle; no yellowish net-work on carapace; head, neck and legs 

 with bright yellow stripes: Mississippi Valley and Gulf slope. 



Fig. 135. — Craplemys geographica {from Fowler). 



Subspecies of G. pseudogeographica 



G. p. pseudogeographica (Gray). Each dorsal plate with a large 

 dark blotch: eastward to Alabama and Ohio; northward to Wisconsin; 

 westward to Kansas and Oklahoma. 



G. p. kohni (Baur). A large yellow spot behind the eye: Pen- 

 sacola to eastern Texas. 



G. p. oculifera (Baur). A yellow spot behind the eye, and 2 yellow 

 stripes on the neck : southern Louisiana. 



6. Chrysemys Gray. Painted turtles. Carapace smooth, de- 

 pressed, without keel, and with wide bridges which join it immovably 

 with the plastron; feet webbed, with long claws; no concentric lines on 

 the plates of the carapace : 2 species. 



Key to the Species of Chrysemys 



ai In the central States C. marginata. 



3.1 On the Atlantic slope C. picta. 



C. marginata Agassiz (Fig. 128). Carapace smooth, dark olive or 

 brown in color, the plates margined with yellow; throat striped with 

 yellow; marginal plates above and beneath blotched with crimson, 

 which may disappear on the dorsal marginal plates in old specimens; 

 plastron yellow, with a broad blackish patch in the center; vertebral 

 row of plates of the carapace alternating with those of the costal rows; 

 length of the carapace 125 mm.; width 90 mm.: central and western 

 States; very common. 



