REPTILES 233 



mm.: New Jersey and southeastern Pennsylvania to Rhode Island, 

 central New York and mountains of western North Carolina; in 

 marshes and ponds and small streams; often common. 



2. Emys Dumeril. Shell moderately high, with narrow bridges, 

 plastron notched behind, movable and joined with the carapace by 

 a ligament on each side; a transverse hinge in front of the bridges 

 divides the plastron into 2 lobes, both of which are movable, although 

 •the shell cannot be completely closed; digits webbed: i species. 



E. Uandingii (Holbrook) (Fig. 133). Carapace black, with numer- 

 ous small yellow spots; plastron yellow in the center, with large irregular 

 black blotches along the two sides; length of carapace 200 mm.; width 



Fig. 133. — Emys blandingi {from Foivler). 



120 mm.: north-central States and New England; westward to Minne- 

 sota; not common. 



3. Terrapene Merrem (C/5/?^(/o Fleming) . Box-turtles. Shell high 

 and very convex; plastron large, united with the carapace by a ligament 

 on each side, rounded at both ends, and with a transverse hinge which 

 divides it into two movable lobes so that the shell can be completely 

 closed; upper jaw with a beak; digits with a small web or with none: 

 6 species. 



Key to the Species of Terrapene 



ai Carapace keeled. 



bi Carapace irregularly marked with yellow T . Carolina. 



b2 Carapace with yellow radiating lines T. major 



32 Carapace not keeled T. ornata. 



T. Carolina (L.). Common box-turtle. Shell more or less globular, 

 with a blunt keel; color yellow and blackish, but very variable; male 

 usually with red eyes, female usually with yellow; length of carapace 



