CROCODILIANS, LIZARDS, AND SNAKES. 

 Crotalus cerastes Hallonell. 



1199 



U.S. 



N. M. 



No. 



18646 



18647 

 1864.f 

 18649 

 18650 

 18651 

 18652 



18653 

 18654 

 18655 



18656 

 186.'.7 

 18658 

 18659 

 18660 



Sex and 



Adnlt . 

 Adult . 

 Ailiilt . 

 Adult. 

 Adnlt . 

 Adult . 

 Youug 



Young 

 Young 

 Young 



Young 

 Young 

 Adult. 

 Adult . 

 Adult . 



Locality. 



ralirnmp Yallev, Nevada 



do ; 



do 



do 



Indian Spring Valley, Nevada 



do 



Asli Meadows (14 miles north of), 

 Nevada. 



Sarcobatu.s Flat, Nevada 



Amargosa Desert, Nevada 



Death Valley (Bennett Wells), Cali- 

 fornia. 



Mohave Desert, California 



Borax Flat (water station), California. 



Panamint Valley, California 



— do : 



Lone Pine, California 



Alti- 

 tude. 



Feet. 



Date. 



4,500 



,200 



1891. 

 Apr. 29 



do ... 



....do ... 

 Apr. 28 

 May 29 

 ...tlo ... 

 Mar. 11 



June 2 

 May 31 

 Apr. 3 



Apr. 6 

 Apr. 22 

 Apr. 24 

 Apr. 23 

 June 7 



Collector. 



Merriam . 



do ... 



do ... 



.... do ... 



Bailej- . . . 



Merriam . 



Stephens. 



Bailey ... 

 Merriam . 

 Bailey ... 



Remarks. 



Merriam . 

 Stei)hens. 

 Nelson... 

 Bailey . . . 

 Palmer . . 



Type locality. 



Catalogue 

 No. 



482 



5022 



8923 



9116 



15312 



^.5713 

 16953-4 



20494 

 21845 

 22049 



22050 



Number 

 of speci- 

 mens. 



Locality. 



From whom received. 



Dr. J. L. Wortman . . 



L. Stejnoger. 

 C. R. ()rcutt. 



Colorado River, Colorado ... A. Schott 



Fort Burhanan, Arizona Dr. B. J. D. Irwin, V. S. A , 



Southern Utah ! Dr. H. C. Yarrow 



Cottonwood Canyon, Nevada: John Kohler 



Solado Valley, Mariposa ~ 

 County, near Terape, Ari- 

 zona. 



Vulture, Arizona 



Salton, on S. P. R. R., Colo- 

 rado Desert, San Diego 

 County, California. 



Chrystoval, Yuma County^ 

 Arizona. 



Yuma Desert, monument 

 200, Arizona. 



Laguna .Station, Colorado 

 Desert, San Diego County, 

 California. 



Coyote Wells, Colorado Des- 

 ert, San Diego County, 

 California. 



Nature of specimen. 



R.J. Young 



Dr. E. A. Mearns. 



.do 



-do 



Alcoholic, 

 do. 

 do. 

 do. 

 do. 



do. 

 do. 



do. 

 do. 



do. 



do. 



GEOGRAPHICAL DISTRIBUTION. 



As is well known, the aggregates of organic beings called faunie and 

 fior.e correspond in part with the natural land divisions of the earth's 

 surface, but not exactly. The first classification of the primary faunie 

 was proposed by Dr. P. L. Sclater in 1858, as follows : 



1. Paleaictic. — Europe, Northern Africa, Northern and Central Asia. 



2. Ethiopian. — Africa south of the Great Desert, and Madagascar. 



3. Indian. — Southeastern Asia and the Malay Archipelago. 



4. Australian. — Australia with New Guinea and the adjacent islands, New Zealand, 

 and Polynesia. 



5. Nearclic. — North America as far south as Mexico. 



6. Neotropical. — Central and South America and the West Indies. 



Subsequently Dr. A. R. Wallace proposed that the name Oriental be 

 used in place of Indian. 



In 1868 Prof. T. H. Huxley proposed that the world's areas be arranged 

 in two divisions, Arctogani and Notoga'a; the former including the 

 Palearctic, Indian, Ethiopian, and Nearctic of Sclater, and the latter 



