13. CISXUDO. 117 



rays, or yellowish with smaller or lai'gcr blackish blotches. Head, 

 neck, and limbs brown, witli yellow or orange spots or marblings. 



Length of shell 13 ccntim. 



East United States. 



a. Ilgr., spir. Iowa. Smithsonian Instit. 



b. S, spir. New Haven, Conn. Dr. G. Riiur [P.]. 



c. 5, spir. Charleston, S. Caroliua. Dr. G. IJaur fP.j. 



d. 2 , stftU. N. America. Dr. J. E. Gray [P.]. 



e. ?,sti!d. N.America. Dr. J. Green [P.]. 



/, //. 2 & hgr., stfld. N.America. Gen. Ilardwicke [P.]. 



h, i. c? ? 1 stffd. N. America. 



k. cf,skel. N.America. 



/, 5,skel. N.America. Dr. Giinther [P.]. 



m. 5 , spir. N. America. 



The three following forms, which I provisionally admit as varieties, 

 perhaps deserve to rank as species : — 



Var. major. 

 Cistudo major, Ayassiz, Contr. N. H. U. S. i. p. 445 (1857). 



Larger and more oval, less gibbose. Hook of upper jaw notched, 

 bicuspid. Digits shortly but very distinctly webbed. Carapace 

 brown with yellow spots, or yellowish olive with dark brown dots 

 and margins to the shields ; plastron yellow, the sutures between 

 the shields blackish. Head and limbs brown with yellow or orange 

 spots. 



Length of shell 17 centim. 



Louisiana, Alabama, Florida. 



a, b, c, d. c? $ , stffd. Louisiana. W. P. Smith [C] 



e,f. (S 2- N. America. 



Var. cinosternoides. 



Emys kiuosternoides, Grm/, Syn. Rept. p. 32 (1831) * ; Dtim. ^ 



Bihr. ii. p. 303 (1835) ; Gray, Cat. Tort. p. 27 (1844). 

 Cistudo triuuguis, Ayassiz, Contr. N. H. U. S. i. p. 445 (1857). 



Shell as in the typical form. Hook of upjjer jaw notched, bi- 

 cuspid. No trace of web between the digits ; only three clawed 

 functional digits to the hind limb. Carapace pale olive or yellowish, 

 with or without dark spots ; plastron uniform yellowish, with the 

 sutures blackish. 



Length of shell 13 centim. 



S.E. United States. 



a. 5 , spir. Mississippi. Smithsonian Instit. 



b. 5 , spir. ? Zoological Society. 



c. S , skel. ? 



* Type (in College of Surgeons) examined. 



k2 



