EMYDHXE. — CXXIL 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. (Malaclemmtjs.) 



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. X. Y. to Texas, along 

 the coast ; valued as food. 



312 PSEUDEMYS Gray. (^tvSijs. false; e>u f .) 



n. 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). Red-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. X. 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. X. 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. 



613. P troosti (Holbrook). Yellow-bellied Terrapin. 

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

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

 ish stripes; shell never keeled. Miss. V alley, X. 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.) 



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