CINOSTERNID^E. LXVIII. 165 



yellow stripes; variable: N. J. to Va., an elegant turtle, 



known by the serrated jaws. 



** Jaws not serrated. (Trddiemys, Ag.) 



2. P. hieroglyphica, (Holbr.) HIEROGLYPHIC TURTLE. 

 Shell smooth, depressed; olive brown with broad reticu- 

 lated, yellowish lines; plastron dingy yellow; head very 

 small. E. U. S. 



3. P. troostii, (Holbr.) YELLOW-BELLIED TERRA-PIN. 

 Greenish - black, lateral plates with horn -colored lines 

 and spots; plastron dull yellow, with large, black blotches; 

 throat with greenish stripes; shell never keeled. Miss. 

 Valley, N. to Ills. 



4. P. elegans, (Wied.) ELEGANT TERRAPIN. Brown 

 with yellowish wavy lines and blotches; a blood-red band 

 on each side of neck; plastron yellow with a dusty 

 blotch on each plate. Ills, to Rocky Mountains. 



5. P. scabra, (L.) Cope. ROUGH TERRAPIN. Dark 

 brown, with yellow stripes; plastron yellow with small 

 black blotches in front; carapace wrinkled. Va. to Fla. 



FAMILY LXVIII. CINOSTERNID^E. 



(The Cinosternoid Turtles.) 



Carapace rather long and narrow, the outline usually 

 rising gradually from the front to a point beyond the 

 center of the shell, then abruptly descending; the bulk 

 of the body therefore thrown backward; margin of the 

 carapace turning downward and inward rather than out- 

 ward; plastron proportionally large, covered with 7, 9 or 

 11 horny plates, the anterior pair coalescing into one; 

 anterior, and sometimes also posterior lobe of plastron, 

 often movable upon the fixed central portion; head 

 pointed; jaws usually strong. 



Turtles of small size, chiefly American. 



