EMYDID^. — LXVII. 163 



1. C. muhlenbergii, (Schweigger) Cope. Muhlenberg's 



Tortoise. Brown with yellowish markings ; plastron 



black with yellowish central l)lotch; an orange spot on 



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



E. Penn. and N. J. 



^^- Upper jaw broad at end, arched downward, with a notch at 

 tip; just beliind tlie tip the horny sheath slants inward so 

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

 edge of h)wer jaw straight, excepting the tip which is strongly 

 upcnrved. {Olyptemys^ Ag.) 



2. C. insculptus, Le 0. Wood Tortoise. Shell car- 

 inated, its plates marked with concentric stri^ 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. guttatus, (Schn.) Ag. Speckled Tortoise. 

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

 obsolete; plastron yellow, blotched with black; shell not 

 carinated; L. ^\. E. U. S., W. to N, Ind. {^LemUe)\ 

 abundant. 



4. EMYS, Brogniart. Tortoises. 



1. E. meleagnis, (Shaw) Ag. Blanding's Tortoise. 

 Jet black; usually with yellowish spots; plastron yellow- 

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

 Wisconsin to Alleirhanies, in moist woods and fields. 



5. CHRYSEMYS, Gray. Painted Turtles. 



1. C. picta, (Herm.) Ag. Painted 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. 



2. C. marginaia, Ag. Plates of carapace alternating 

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



