236 VERTEBRATE ANIMALS OF THE UNITED STATES 



of carapace 240 mm.; width 180 mm.; carapace circular, notched at 

 the sutures of the marginal plates: central States; eastward into New 

 York and Pennsylvania in the Susquehanna River; westward into 

 Missouri and Arkansas; northward to Michigan and Lake Champlain; 

 common. 



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. 



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: Pensacola 

 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: i species. 



C. picta (Schneider). 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; length of the 

 carapace 125 mm.; width 90 mm.: eastern, central and western States; 

 very common. 



Subspecies of C. picta 



C. p. marginata Agassiz (Fig. 128) . Vertebral row of plates alternat- 

 ing with those of the costal rows: northern New York to Wisconsin; 

 southward to Missouri. 



C. p. bellii (Gray) . Yellow margins of dorsal plates absent ; plastron 

 with a pair of wide black bands joined at the ends: Great Plains; west- 

 ward to Vancouver Island; northeastward to northern Michigan. 



C p. dorsalis Agassiz. Carapace with a yellow dorsal stripe: 

 lower Mississippi Valley; northward to Missouri. 



