38 CINOSTERNID A. 
shields of the plastron are often, especially in full-grown spe- 
cimens, much smaller than the area assigned to them, the inter- 
spaces showing 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-b. 9 & yg., spir. Carlisle, Pensylvania. Smithsonian Inst. 
e. WY e., spin. Delaware. H. Doubleday, Esq. 
Pal. 
a. 9, stuffed. Louisiana. — 
e. 3, spir. Texas. Dr. A. Giinther [P.]. 
f. &, spir. N. America. Lord Ampthill [P. }. 
g-t, k. 3 Q, spir. N. America. 
l. So, skel. N. America. 
m. Her., shell. N. America. 
2. Cinosternum carinatum. 
Aromochelys carinata, Gray, Cat. Sh. Rept. i. p. 47, pl. xx. a (1855) ; 
Strauch, Chelon. Stud. p. 89 (1862), and Verth. Schildkr. p. 96 
(1865); Gray, Suppl. Cat. Sh. Rept. i. p. 66 (1870); Yarrow, in 
Wheeler's Explor. Surv. W. 100th Mer. v. p. 582 (1875). 
Goniochelys triquetra, Agass. Contr. N. H. U. 8. i. p. 423, & ii, 
p. 642 (1857). 
? Goniochelys minor, Agass. 1. ce. p. 424. 
? Aromochelys minor, Strauch, ll. ce. 
Head larger, jaws stronger than in the preceding. Carapace 
tectiform, with a strong keel throughout life; shields distinctly 
imbricate, 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. 
a,b,c, d. 3 9, stuffed. Louisiana. W. P. Smith [C.]. (Types.) 
3, Cinosternum hirtipes *. 
Cinosternon hirtipes, Wagler, Syst. Amph. pl. v. figs. 29, 30 (1830), 
and Icon. pl. xxx. (1883) ; Dum. § Bibr. it. p. 370 (1834) ; Bocourt, 
eee Se. Mex., Rept. p. 25 (1870), and Journ. de Zool. v. p. 893 
(1876). 
* Type examined. 
