36 



description is in the arrangement of the color on the back. Though 

 the pkm of arrangement is the same, yet, instead of the color being 

 placed so as to form five continuous blackish cross-bauds from the base 

 of the tail to the interscapular region, the bands are more or less inter- 

 rupted, thereby giving to the region somewhat of a marbled appear- 

 ance. 



PHRYNOSOMA HERNANDEZl, Cope [No. 8567]. 



Phryrtosoma hernandezi, Cope, Check-list, 1875, 48. 



Taimya hernandezi, Girakd, Herp. U. S. Expl. Exped., 1858, 395.— Baird, P. R. R. Rep., x, 

 1859, Whipple's Route, Reptiles, 38; U. S. and Mex. Bouud. Surv., ii, pt. ii, 

 1859, Reptiles, 8. 

 Locality : Sonora, Mexico. Found living on the low, sandy, desert- 

 like plains along the gulf coast. One of these interesting little animals 

 was kept as a pet on board the ship until it died. After its death, its 

 body was preserved in alcohol. When the collection was being exam- 

 ined attentively, in view to the determination of the species, the throat, 

 mouth, and nostrils of this one were found to be completely clogged up 

 with parasites, small round worms, from a half to three-quarters of an 

 inch long. Its diet while in captivity consisted exclusively of flies and 

 cockroaches, and it is highly probable. that from the one or the other of 

 these insects originated the parasites. The latter are now in the hands 

 of an eminent helminthologist for determination. 



SAUEOMALUS ATER, Dumeril [No. 8563]. 



Sauromalus afer, " Dumeril, Arch, du Mas." — Cope, Check-list, 1875, 47. — Couics, 

 Wheeler's Geographical and Geological Explorations and Survey West of the 

 100th Merid., vol. v, 1875, Zool., 600. 



Euphryne obesa, Baird, Proc. Acad. Nat. Sci. Phila., 1858, p. 253 ; U. S. and Mex. Bound. 

 Surv., ii, pt. ii, 1839, 6, pi. 27.— Cope, Proc. Acad. Nat. Sci. Phila., 186S, 310.— 

 Yarrow, Wheeler's Geographical and Geological Explor. and Surv. West of 

 the 100th Merid., vol. v, 1875, Zool., 559. 



Locality : Angel Island, Gulf of California. Abundant on this island. 

 The largest specimen procured measured 22 inches in length. The old 

 individuals are marked with one, two, or three large, rounded or irregu- 

 lar, grayish blotches somewhere on their body. They were easily cap- 

 tured by hand as they lay in the grass, sunning themselves. They 

 eyed us timidly as we moved them about with our feet; then, appar- 

 ently perceiving their danger, would start up and run with considerable 



