152 



CALIFORNIA ACADEMY OF SCIENCES. 



Natrix valida (Kenn.) 



Regina valida. 



1860, Kennicott, Proc. Ac. Nat. Sci. Phila., p. 334. 



(1887, Cope, Bull. U. S. Nat. Mus., No. 32, p. 74.) 

 Tropidonotus tephropleura. 



1860, Cope, Proc. Ac. Nat. Sci. Phila., p. 341. 

 Tropidonotus validus validus. 



(1875, Cope, Bull. U. S. Nat. Mus., No. 1, p. 42.) 



(1883, Yarrow, Bull. U. S. Nat. Mus., No. 24, p. 132.) 



(1887, Belding, West Am. Scientist, iii, 24, p. 99.) 

 Tropidonotus validus tephropleura. 



1883, Yarrow, Bull. U. S. Nat. Mus., No. 24, p. 133. 



(1887, Belding, West Am. Scientist, iii, 24, p. 98.) 

 Tropidonotus leberis validus. 



[1883, Garman, Mem. Mus. Compr. Zool. Cambr., viii, 3, pp. 28, 

 143 (part).] 

 Natrix valida valida. 



1892, Cope, Proc.'u. S. Nat. Mus., 1891, p. 670. 

 Tropidonotus validus. 



1893, Boulenger, Cat. Snakes, Brit. Mus., i, p. 237 (part). 

 (1894, Giinther, Biologia C.-Am., p. 134.) 



The following table, based upon fifteen specimens from 

 San Jose del Cabo, will serve to show the variation in the 

 scale characters of this species. 





CO 

 <D 

 OC 

 Cj 



CO 



g 



CO 



a 

 C 



CO 



O 



Is 



O 



Hows of 

 smooth 

 scales. 



03 



IS 



U OS 



aj 



'.3 

 o 



o 

 o 



IB 



0! 

 O 



o 



TO 

 O 



Temporals. 



as 

 O 



Eight. 



Left. 



72 



145 



19 







8 



10 



2-2 



3-3 



1-2 



1-2 



73 



143 



19 







8 



10 



?-2 



3-3 



1-2 



1-2 



74 



146 



19 







8 



10 



1-1 



3-3 



1-2 



1-2 



75 



144 



19 







8 



10 



1-1 



3-3 



1-3 



1-2 



— 



142 



19 







8 



10 



1-2 



3-3 



1-2 



1-2 



77 



142 



19 







7-8 



10 



1-1 



3-3 



1-2 



1-2 



78 



144 



19 







8 



10 



1-1 



3-2 



1-2 



1-3 



79 



144 



19 



1 (part) 



8 



10 



2-2 



3-3 



1-2 



1-2 



80 



142 



19 



1 (part) 



8 



10 



1-1 



3-3 



1-3 



1-2 



81 



145 



19 







8 



10 



2-1 



3-3 



1-2 



1-2 



82 



1,39 



19 







8 



10 



2-2 



3-3 



1-3 



1-2 



— 



141 



19 







8 



10 



1-1 



3-3 



1-2 



1-2 



73 



140 



19 







7-8 



10 



3-1 



3-3 



1-2 



1-2 



78 



146 



19 







8 



10 



1-1 



3-2 



1-2 



1-3 



81 



147 



19 







8 



10 



1-1 



3-3 



1-2 



1-2 



