38 



CINOSTEENID^. 



shields of the plastron arc often, especially in full-grown spe- 

 cimens, niucli smaller than the area assigned to them, the inter- 

 Bpaccs showijig the exposed underlying bones. Male with a patch 

 of small, horny, keeled tubercles on the hinder side of the leg 

 and another below the thigh. Tail without a nail-like horny 

 appendage. Carapace yellowish or brown, uniform or spotted or 

 streaked with dark brown ; the shields margined with blackish ; 

 plastron yellow, uniform or with dark brown blotches sometimes 

 nearly covering the shields. Neck and limbs marbled with brown ; two 

 parallel yellow lines on each side of the head, the upper passing above 

 the lower below the eye ; a yellow streak on each side of the mandible. 



Length of shell 11 centim. 



Eastern North America, from Canada to the Gulf of Mexico. 



a-h. 2 & yg., spir. Carlisle, Pensylvania, Smithsonian Inst. 



c. Yg., spir. Delaware. H. Doubleday, Esq. 



a. 2 , stuffed. Louisiana. 



«-c?,spir. Texas. Dr. A. Giinther fP.]. 



/•.c?,spn-. N.America. Lord AmpthiU [P.]. 



<j-i, k. ^ 2) spir. N. America. 



I. d" , skel. N. America. 



m. Ilgr., shell. N. America. 



2. Cinosternum carinatum. 



Aromochelys carinata, Gra;/, Cat. Sh. Kept. i. p. 47, pi. xx. a (1855) ; 

 Sfratich, CJwlon. Stiul. p. .39 (1862), and Verfh. Schildkr. p. 90 

 (1805); Gray, Siijipl. Cat. Sh. Rept. i. p. 06(1870); Yan-oiv,in 

 Jnieelcrs Kiplor. Surv. W. 100th Mer. v. p. 582 (1875). 



Gouiochelys triquetra, Agass. Contr. N. H. JJ. S. i. v. 4-^3 & ii 

 p. 642 (1857). 1' - ' 



? Gouiochelys minor, Ac/ass. I. c. p. 424. 



? Aromochelys minor, Strauch, II. cc. 



Head larger, jaws stronger than in the preceding. Carapace 

 tectiform, with a strong keel throughout life; shields distinctly 

 imbiicate, vertebrals all longer than broad. Plastron truncate 

 anteriorly; no distinct gular shield; humeral shields forming a 

 shorter suture than the pectorals, femorals a longer one than the 

 anals. Shell and soft parts pale olive or yellowish brown, spotted 

 or streaked with blackish brown ; shields of the carapace edged 

 with black, the hinder black edge of the costals broad. 



Length of shell 13 centim. 



Georgia to Arizona. 



«, 6, c, f?. c? ?, stuffed. Louisiana. W. P. Smith [C.]. (Tyi^es.) 



3. Cinosternum hirtipes *. 



Cinostemon hirtipes, Wac/lcr, Syst. Amph. pi. v. figs '>9 30 (1830) 

 and Icou.jA. xxx. (1833) ; Dam. ^-Bibr. ii. p. 370 (1834) ; Bocourf 

 Miss. Sc. Mex., Bcpt. p. 25 (1870), and Joum. de Zool.y. p. 393 



(1870). 



Type examined. 



