HERPETOLOGY OF LOWER CALIFORNIA. 



147 



Another individual has this plate present on one side only, 

 thus agreeing with the specimen from St. Thomas, Ne- 

 vada, recorded by Dr. Stejneger (1. c, p. 206), who also 

 mentions and figures specimens in which a second sub- 

 ocular is present. In view of these facts, it appears that 

 this character is not constant enough to warrant the re- 

 tention of the name hexale^is. 



The largest individual measures 940 mm. in total length. 



This species was first described from a specimen col- 

 lected by Col. J. D. Graham, in " Sonora, Mex." Sub- 

 sequently, Mr. Xantus found it at Cape San Lucas, and 

 Mr. Belding, at La Paz. 



List of specimens of Salvador a grahamice . 



Cal. Acad. 

 Sci.No. 



Locality. 



Date. 



Collector. 



652 



Comoudu, L. C. 



Mar. 3, 1889 



W. E. Bryant. 



760 



Agua Calieute, L. C. 



Oct., 1890. 



" 



761 



" 



" 



" 



762 



Sau Jose del Cabo, L. C. 



Oct. 7, 1890 



" 



812 



" 



Sept., 1893 



Gustav Eisen. 



813 



" 



" 



" 



876 



" 



Aug., 1893 



" 



1406 



Sierra San Lazaro, L. C. 



Sept., 1894 



Eisen and Vaslit. 



1546 



San Jose del Cabo, L. C. 



" 



a 



Bascanion flagellum frenatum Stejn. 



Bascanium flagelliforme testaceum. 



1875, Cope, Bull. U. S. Nat. Mus., No. 1, p. 40. 



1883, Yarrow, Bull. U. S. Nat. Mus., No. 24, p. 112. 



(J887, Belding, West Am. Scientist, iii, No. 24, p. 89.) 



(1887, Cope, Bull. U. S. Nat. Mus., No. 32, p. 71.) 

 Bascanium flagelliforme. 



1891, Cope, Proc. U. S. Nat. Mus., p. 626 (part). 

 Bascanion flagellum frenatum. 



1893, Stejneger, N. A. Fauna, No. 7, p. 208. 



The specimens enumerated below have been compared 



