Graptemys pseudogeographica pseudogeographica (Gray) 

 (Malacoclemmys lesueurii (Gray) ) LcSueur's Terrapin, RidgC' 

 back 

 With a yellow spot behind each eye 47. 



47. Carapace with a low, even, mid'dorsal keel; larger plates of carapace 



greenish, with a yellow network; Vermont to Texas 

 Graptemys geographica (LeSueur) Map Turtle 

 Keel on the carapace rising in the form of tubercles, making a jagged 

 profile; yellow markings on carapace not in the form of a network, 

 usually appearing as rings; with a broad yellow band covering chin; 

 La. to Texas 



Graptemys oculifera (Baur) Ocellated Terrapin 



48. Head dark, with a large orange patch of color much larger than the 



eye on each side behind the eye; N. Y. and R. I. to N. C. 



Clemmys muhlenbergii (Schoepff) Eastern Pond Turtle 

 (Chelopus muhleyihergii (Schoepff) ) 

 Head not so 49. 



49. Body and carapace dark, with yellow spots about the size of the eye 



scattered over the surface; Maine to Wis. and Florida 



Clemmys guttata (Schneider) Spotted Pond Turtle 

 Not so 50. 



50. Carapace with fine yellow dots or streaks on each plate; head brown or 



yelloVk^, with sm.all dark dots or markings; rear margin of carapace 

 practically smooth in the adult; West Coast 



Clemmys marmorata (B. 6? G.) Western Pond Turtle 

 Plates of carapace with concentric dark markings or with concentric 

 ridges; rear margin of carapace serrated; eastern species 51, 



51. Head and limbs dark, tinged with reddish beneath; plastron with large 



dark blotches; frequenting damp woods, swamps, or wood streams; 

 Maine to Va. and Wis. 



Clemmys insculpta (Le Conte) Wood Turtle 

 Body grayish, with fine dark dots or markings; plastron with fine dark 

 streaks, or unmarked; frequenting salt marshes of the Atlantic and 

 Gulf coasts 52. 



52. With a tubercle on each vertebral plate, giving the mid'dorsal keel a 



jagged outline; carapace usually brown or black; Gulf Coast 



Malaclemys pileata (Wied) (and varieties) Diamond'back 



Terrapin 

 {Malacoclemmys palustris (Gmel.) ) 

 With an even mid-dorsal keel; carapace usually gray to greenish; At- 

 lantic Coast 



Malaclemys centrata (Latreille) Diamond-back Terrapin 

 (Malacoclemmys palustris (Gmel.) ) 



GENERAL REFERENCES 



Agassiz, L. 1857. Contributions to the Natural History of the United States. 

 Vols. 1 and 2. Little, Brown 6? Co. Boston. 



439 



