EMYDID.E. CXXII. 209 



keel of carapace stronger, each plate of the vertebral series with a 



blackish projection behind, which is more or less imbricated over 



the succeeding plate; plastron yellowish, marbled with blackish; 



head, neck, and legs with bright yellow stripes. Wis. to Ohio and 



S. W., not rare. (To Charles Albert Le Sueur, artist and nat- 



uralist.) 



aa. Lower jaw without spoon-shaped dilatation; the cutting edges smooth. 



Salt-marsh turtles. (Malaclemmys.) 



610. M. palustris (Gmelin). SALT-MARSH TURTLE. 

 DIAMOND-BACK. Greenish or dark olive, rarely black; plates, 

 both of carapace and plastron, usually with concentric dark stripes ; 

 shell smooth or with concentric grooves. N. Y. to Texas, along 

 the coast ; valued as food. 



312 PSEUD EMYS Gray, fycv&fa false; 



a. Loose skin between legs without scales; ridge in alveolar surface tubercu- 



late; young marked with confluent, lozenge-shaped figures. 

 b. Jaws coarsely serrated ; symphysis of upper with prominent hook. 



611. P. rugosa (Shaw). KED- BELLIED TERRAPIN. Dusky, 

 with irregular red markings above ; marginal plates with much red ; 

 plastron red or partly yellowish ; head and neck brown, with red- 

 dish lines : variable. N. J. to Va. (Lat., wrinkled.) 



bb, Jaws not serrated. 



612. P. hieroglyphica (Holbrook). Shell smooth, depressed; 

 olive brown, variously marked with reticulated or concentric 

 yellowish lines ; plastron yellowish ; head and neck with yellow 

 lines ; head small. N. Y. to Wis. and S. 



aa. Loose skin between legs not scaly; ridge in alveolar surface not tubercu- 

 lar; edge of marginal plates notched. Vertebral plates with length- 

 wise bands, other scales with transverse bands', these growing obscure 

 with age. 

 c. Carapace not keeled. 



618. P troosti (Holbrook). YELLOW-BELLIED TERRAPIN. 

 Greenish-black, lateral plates with horn-colored lines and spots ; 

 plastron dull yellow, with large, black blotches ; throat with green- 

 ish stripes ; shell never keeled. Miss. Valley, N. to 111. 



614. P. elegans (Wied). Brown, with yellowish wavy lines and 

 blotches ; a red or yellow band on each side of neck ; plastron 

 yellow with a dusky blotch on each plate. 111. to Idaho, and S. 



cc. Carapace strongly keeled. 



615. P. scabra (L.). Dark brown, with irregular yellow stripes; 

 plastron yellow with small black blotches in front ; head and neck 

 black, with yellow lines ; carapace wrinkled. Va. to Fla. (Lat., 

 rough.) 



