198 University of California Publications in Zoology  [Vou.17 
Synonyms.—Crotalus pyrrhus; [2] Crotalus lecontei, part. 
Common Names.—Bleached Rattlesnake; White Rattlesnake. 
Rance.—The Colorado and Mohave deserts. Has been taken north- 
west to Fairmont, northern Los Angeles County (Grinnell and Grin- 
nell, Throop Inst. Bull., 35, 1907, pp. 59-60) ; northeast to 14 miles 
northeast of Blythe Junction, San Bernardino County (Camp, Univ. 
Calif. Publ. Zool., 12, 1916, pp. 533-534) ; west to 5 miles southwest 
of Banning, in Riverside County (Mus. Vert. Zool.), to Asbestos 
Spring, Santa Rosa Mountains, Riverside County (Atsatt, Univ. Calif. 
Publ. Zool., 12, 19138, p. 44), and to Mountain Spring, San Diego 
County (Van Denburgh, Proce., Calif. Acad. Sci., ser. 2, 4, 1894, pp. 
450-455). Oceupies the Lower Sonoran life-zone, extending locally 
into Upper Sonoran. Inhabits nearly all types of arid environment. 
(See fig. 14.) 
Crotalus cerastes Hallowell 
Sidewinder 
OriGINAL DeEscripTion.—Crotalus cerastes Hallowell, Proe. Acad. 
Nat. Sei. Phila., 7, 1854, pp. 95-96. 
Type Locatiry.—Borders of the Mohave River and in the desert 
of the Mohave. 
Common Name.—Horned Rattlesnake. 
RancGe.—Colorado and Mohave deserts; also north into the Inyo 
region. Northernmost stations are: Mesquite Valley (Meek, Field 
Columb. Mus., zool. ser., 7, 1905 [1906], p. 18) and Lone Pine (Stej- 
neger, N. Amer. Fauna, 7, 1893, p. 218), in Inyo County ; westernmost 
stations are: Oro Grande, in San Bernardino County (Meek, loc. cit.), 
Torres [Toro], west of Mecea, in Riverside County (Mus. Vert. Zool.), 
and Coyote Wells, in Imperial County (Cope, Ann. Rep. U. S. Nat. 
Mus., 1898 [1900], p. 1199). Occupies the Lower Sonoran life-zone. 
Restricted to sand-dune areas and level tracts of loose sandy soil. (See 
fig. 14.) 
Order TESTUDINATA 
Suborder ATHECAE 
Family DERMOCHELIDAE 
Dermochelys schlegelii (Garman) 
Pacific Leatherback Turtle 
OrigiInaL Description.—Sphargis schlegelii Garman, U. 8. Nat. 
Mus. Bull., 25, 1884, pp. 294-295 (see also p. 303). 
