110 TESTUDINID #. 
a. d, spir. Washington, D.C. Smithsonian Instit. [P.]. 
b. 2, stftd. Delaware. E. Doubleday, Esq. [P.]. 
e-e. dO, spir. N, America. Dr, J. E. Gray [P.]. 
tig 3 &, spir. N. America. 
h. 3, skel. N. America. 
7,k. 3 Q, shells. N. America. 
8. Clemmys marmorata. 
Emys marmorata, Baird §& Gir. Proc. Ac. Philad. 1852, p. 177; 
Bocourt, Miss. Sc. Mex., Rept. p. 16-1870). 
nigra, Hallow. Proc. Ac. Philad. 1854, p. 91, and Rep. U.S. 
Explor. Surv. R. R. x. pt. iv. p. 8, pl. i. (1859). 
Actinemys marmorata, Agassiz, Contr. N. H. U.S. i. p. 444, pl. iii. 
fies. 5-8 (1857); Girard, U. S. Explor. Exped., Herp, p. 465, 
pl. xxxii. (1858). 
Clemmys marmorata, Strauch, Chelon. Stud. p. 108 (1862), and Verth. 
Schildkr. p. 68 (1865). 
wosnessenskyi, Strauch, ll.ce. p. 114, pl. —, & p. 68. 
Geoclemys marmorata, Gray, Suppl. Cat. Sh. Rept. 1. p. 27 (1870). 
wosnessenskyi, Gray, App. Cat. Sk. Rept. p. 11 (1872). 
Chelopus marmoratus, Cope, Check-List N, Am. Rept. p. 53 (1875). 
Strikingly resembling Hmys orbicularis. Carapace obtusely uni- 
carinate in the young, the keel becoming almost or quite indistinct 
in the adult; shiclds nearly smooth in the adult, with radiating 
strie in the young. Nuchal small, narrow ; vertebrals 2 to 4 much 
broader than long, a little narrower than the second costal. Plastron 
large, concave in the male, openly emarginate posteriorly ; the width 
of the bridge much less than the length of the hind lobe ; pectoral 
and abdominal shields subequal in size; the longest median suture 
is that between the anals, the shortest that between the humerals ; 
axillary and inguinal shields absent or small. Head rather large ; 
upper jaw not hooked, notched in the middle; the width of the 
mandible at the symphysis nearly equals the horizontal diameter of 
the orbit. Digits webbed to the claws, which are long and strong. 
Tail about half as long as the shell in the males. Carapace dark 
olive or blackish, with yellowish dots or radiating lines, which 
markings may disappear in old specimens ; plastron yellow, sutures 
black, with or without some large black blotches. Head olive or 
brown above, with small black markings, yellow inferiorly, uniform 
or black-dotted ; limbs brown, spotted with black and yellow. 
Young coloured like those of Hmys orbicularis. 
Length of shell 18 centim. 
California. 
a-b. 3, spir. Pacific Coast of N. America. 
ce. Hgr. 3, spir. Santa Cruz. Mr. A. Forrer [C.]. 
d, Her. g, shell, San Diego. Mrs. Rosa Smith 
Eigenmann [ P.]. 
