EMYDID^. LXVII. 163 



1. C. muhlenbergii, (Schweigger) Cope. MUHLEXBERG'S 

 TORTOISE. Brown with yellowish markings ; plastron 

 black with yellowish central blotch; an orange spot on 

 each side of neck ; shell somewhat carinated; L. 4J. 

 E. Penn. and N. J. 



** Upper jaw broad at end, arched downward, with a notch at 

 tip; just behind the tip the horny sheath slants inward so 

 that the width of the jaw is less than that of the forehead; 

 edge of lower jaw straight, excepting the tip which is strongly 

 upcurved. (Glyptemys, Ag.) 



2. C. insculptus, Le 0. WOOD TORTOISE. Shell car- 

 inated, its plates marked with concentric stria? and radi- 

 ating lines; plastron with a black blotch on each plate; 

 L. 8. U. S., E. of Ohio, in woods and fields. 



3. NANEMYS, Agassiz. SPECKLED TORTOISES. 



1. N. guttafus, (Schn.) Ag. SPECKLED TORTOISE. 

 Black, dotted more or less with orange, these spots rarely 

 obsolete; plastron yellow, blotched with black; shell not 

 carinated; L. 4. E. U. S., W. to N. Ind. (Levette)', 

 abundant. 



4. EMYS, Brogniart. TORTOISES. 



1. E. meleagris, (Shaw) Ag. BLAXDIXG'S TORTOISE. 

 Jet black; usually with yellowish spots; plastron yellow- 

 ish with black blotches; head \vith yellow spots; L. 8. 

 Wisconsin to Alleghaiiies, in moist woods and fields. 



5. CHRYSEMYS, Gray. PAIXTED TURTLES. 



1. C. picia, (Herm.) Ag. PAIXTED TURTLE. MUD 

 TURTLE. Greenish black; plates margined with paler; 

 marginal plates marked with bright red; plastron yellow, 

 often blotched with brown; L. 8. E. U. S., one of the 

 most common turtles. 



Var. marginata, Ag. Plates of carapace alternating 

 or in quincunx, the lateral rows out of line with the 



