CROCODILIANS, LIZARDS, AND SNAKES. 

 Zanienix twniatus HaUowell . 



817 



Locality. 



California 



Provo, Utah 



do 



Little Colorado 



Cafion Creek, Colorado 



AVest of Rio Grande 



Nutrias, New Mexico 



Antelope Springs, Nevada 

 Walker Basin, California. 



Carson, Nevada 



Fort Whipple, Arizona... 



Baird, California 



West of Rocky M o u n- 



tains, "Oregon." 

 Fort Whipple, Arizona . . . 



Prescott, Arizona 



Ogden, Utah 



When 

 collected. 



July — , 1872 



,1872 



Sept. 2, 1875 

 May -,1877 

 , 1865 



From whom received. 



Dr. Wm. Gambel . 

 Dr. H. C. Yarrow . 



H. B. MoUhausen . . . 

 Dr. C. G. Newberry. 



H. W. Heusbaw 



Dr. H. C. Yarrow 



H. W. Henshaw 



do 



Dr. E. Cones. U. S. A . 



C. H. Townsend 



Governor Stephens.. 



Dr. E. Coues 



Capt. W. L. Carpenter . . . 

 Davis 



Nature of 

 specimen. 



Alcoholit 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 

 do. 



do. 

 do. 

 do. 



U.S.N.M. 

 No. 



Locality. 



Altitude. 



When 

 collected. 



Nature of 

 specimen. 



18072 

 18073 

 18074 

 18075 

 18076 



Argus Range, Maturango Spring, California 



Coso Valley, California 



Coso Valley, ui>ar Maturango Spring, California . 



Coso Mountains, Coso, California 



Panamint Mountains, Willow Creek, California.. 



Feet. 



I May 4 ; Fisher. 



i May 5 I do. 



I May 11 Palmer. 



1 May 18 Fisher. 



5,400 Mav 19 | Nelson. 

 I ■ I 



SALVADORA Baird and Girard. 



Salvadora Baird and Girard, Cat. N. Amer. Eept., Pt. 1, Serpents, 1853, p. 104. — 



Cope, Bull. U. S. Nat. Mus., No. 32, 1887, pp. 57, 72. 

 Fhimothyra Copk, Proc. Acad. Nat. Sci. Phila., 1860, p. 566; Check-list N. Aiuer. 



Batr. Rept., 1875, p. 38. 



Form elongate, head distinct from body. Cephalic plates normal, 

 except rostral shield, which is expanded laterally with more or less 

 free margins, and is recurved on the summit of the muzzle. Two 

 nasals. Preocular divided. Scales smooth bifurcate. Anal and sub- 

 caudal scutelhe divided. Teeth longer posteriorly. Pupil round. 



This genus is more like the Lytorliynchus of Peters of Africa and the 

 adjacent parts of Asia, and like it, inhabits, as to its typical form, the 

 8. grahamia', dry and rocky regions. It has the same peculiarly 

 expanded rostral plate as the genus Fhyllorhynchus Stejneger, and dis- 

 plays a similar tendency to division of the lateral head sliields. Three 

 species of Salvadora are known, all of which are found within the 

 political limits of Mexico, and one of them {S. (frahamice) occurs also 

 in the Sonoran region within tlie United States. 



I proposed' to change the name of this genus, because it had 

 been previously given by Linnaeus to a genus of plants. As it is not 

 now regarded as necessary to maintain uniform difference between 

 plant and animal generic names, 1 have recurred to the name of I^aird 

 and Grirard. 



1 Proc. Acad. Nat. Sci. Phila., 1860, p. 566. 

 NAT MUS 98 52 



