No. 4. 
REPORT UPON THE REPTILES COLLECTED ON THE SURVEY. 
BY J. G. COOPEK, M. D. 
CLASS REPTILIA. Reptiles. 
Order I. CHELONIA. The Turtles. 
ACTINEMYS MARMORATA, Agass. 
The Western Pond Turtle. 
Emis marmorala, B. & G. Proc. Acad. Nat. Sc. Phil. VI, 1852, 177. 
Emys nigra, Hallowell, Proc. Acad. Sc. VII, 1854, 91. —Ibid. P. R. R. Surv. Rep. vol, X, 1858, p. 3, pi. I. 
Aclinemys marmorata, Agass. Cont. to Nat. Hist, of N. A. I, 1857, 444 ; II, pi. 3, fig. 5-8.— Girard, U. S. Expl. 
Exped. Herpetology, 466, pi, XXXII 
Sp. Ch. — Carapax elliptical, convex, with an obtuse vertical ridge. Plastron sub-ellipsoid, broadest anteriorly. Limbs 
scaly, scales in front large, not imbricated ; behind, moderate sub-tubercular. Nails rather stout. Tail above keeled sub-conical 
or tapering. Color black above, or olive with small black mottlings ; beneath yellowish, with a black blotch in the young. 
This, the only turtle yet known from the west of the Rocky mountains, is common in fresh¬ 
water ponds and rivers west of the Cascade mountains, though less so in the Columbia than 
in the warmer ponds. Mr. Gibbs also saw turtles at the mouth of the Yakima which were 
probably of this species. It is rather difficult to catch, being very watchful, but will sometimes 
bite at a hook. The specimen I preserved was taken when about to deposit its eggs, on the 
9th of June. I tried to hatch some of them, but without success. Pound in the ponds about 
Fort Steilacoom.—C. 
It attains, when full grown, a length of about eight inches, and a corresponding width. 
The black of the back has a brownish or rusty tinge. It is called by the Nisquallies 
El-la-chick —S. 
Order II. SAURIA. The Lizards. 
ELGARIA PRINCIPIS, Baird & Girard. 
The Spotted Elgarla 
Elgariaprinciple, B. & G. Proc. Acad. Sc. Phil. VI, 1852,175.— Girard, U. S. Expl. Exped. Herpetology, 214, pi. 
XXII, figs. 9-16. 
Sp. Ch.—D orsal scales in 48 transverse, and 14 longitudinal series. Three unequal post-nasals. Preanal shields larger than 
the abdominal. Tail longer than body and head together. 
Several specimens of this graceful and harmless little animal were obtained about the end 
of July, on the “ Yakolt,” and another prairie on the banks of the Cathlapoot’l river. They 
