42 CINOSTERNID &, 
8. Cinosternum integrum. 
Kinosternum integrum, Leconte, Proc. Ac. Philad. 1854, p. 183; 
Bocourt, Journ. de Zool. y. p. 893 (1876) ; Giinth. Biol. C-Am., 
Rept. p. 26 (1885). 
Thyrosternum integrum, Agassiz, Contr. N. H. U. S. i. p. 429 
1857). 
ae integra, Gray, Suppl. Cat. Sh. Rept. i. p. 69 (1870). 
Cinosternum rostellum, Bocourt, 1. ¢. p. 391. 
hirtipes (non Wagl.), Giinth. 1. ¢. p. 15, pls. xii.—xv.* 
pensylvanicum (non Gimel.), Dugés, La Naturaleza (2) i. p. —, 
pl. xi. figs. 1-4 (1888). 
Head rather large; jaws strong; beak feebly hooked. Digits 
extensively webbed. Carapace with a feeble keel in the male and 
young, keelless in the adult female. Plastron entirely closing the 
box, feebly nicked posteriorly, and without bridge in the adult ; 
lobes well movable, anterior longer than the immovable portion ; 
gular shield not half the length of the front plastral lobe ; suture 
between the pectoral shields much shorter than that between the 
humerals; axillary and inguinal shields narrowly in contact, or 
narrowly separated. Tail of male ending in a nail-lke horny 
tubercle. Carapace brown, with small blackish dots in the male, 
with radiating lines in the halfgrown specimen ; the sutures between 
the shields blackish ; plastron yellowish or brown; head dark brown 
above, spotted or marbied with yellowish ; throat and jaws yellowish, 
spotted with dark brown. 
Length of shell 16 centim. 
Mexico. 
a-b,c. 3,9, & her., spir. Mazatlan. Mr. A. Forrer [C. ]. 
d-e. 9 & yg., spir. Tres Marias Islands. Mr. A. Forrer [{C. ]. 
SF. Yg., spir. Presidio. Mr. A. Forrer [C. ]. 
9. Cinosternum leucostomum. 
Cinosternum leucostomum, A. Dum. Cat. Méth. Rept. p. 17 (1851), 
and Arch, Mus. vi. p. 239, pl. xvil. (1855); Gray, Cat. Sh. 
Rept. i. p. 46 (1855); Cope, Proc. Ac. Philad. 1865, p. 189; Bo- 
court, Miss. Sc. Mex., Rept. p. 25 (1870); Selater, Proce. Zool. Soc, 
1871, p. 745; Bocourt, Journ. de Zool. v. p. 894 (1876). 
scorpioides, part., Gray, J. c. p. 44. 
Swanka scorpioides, part., Gray, Suppl. Cat. Sh. Rept.i. p. 67 (1870). 
maculata, part., Gray, . ¢. p. 68. 
leucostoma, Gray, l.c. p. 69. 
Cinosternum leucostomum, part., Giinth. Biol. C-Am., Rept. p. 17, 
pl. xvii. (1885). 
brevigulare, Giinth. 1. c. p. 17, pl. xviii. f. A. 
—— cobanum, Giinth. l.c. p. 18, pl. xvii. f. B. 
brevigulare, Cope, Proc. Am. -Philos, Soc. xxii. p. 889 (1885). 
—— postinguinale, Cepe, Bull. U.S. Nat. Mus. no. 32, p. 23 (1887). 
* Tt should be mentioned that Dr. Ginther, who obtained the type of 
Wagler’s C. hirtipes from the Munich Museum on loan, still adheres to his 
opinion that the specimens from Mazatlan and Tres Marias Islands should be 
referred to that species rather than to C. integrum. 
