HERPETOLOGY OF LOWER CALIFORNIA. I07 



1883, Yarrow, Bull. U. S. Nat. Mns., No. 24, p. 55.) 

 (1884, S. Garmau, Bidl. Essex Inst., xvi, 1, p. 16.) 

 1885, Boulenger, Cat. Lizards Brit. Mus., ii, p. 212. 

 (1887, Cope, Bull. U. S. Nat. Mus., No. 32, p. 35.) 

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



There is a very great amount of variation in the size, 



shape, and number of the head plates, even the frontal 



being sometimes divided transversely. The largest dorsal 



scales are along the median line. They are replaced, 



sometimes gradually and sometimes abruptly, by granules 



on the sides. Seventeen to twenty-four of the largest 



dorsals are equal to the length of the head to the posterior 



edge of the interparietal (occipital) plate. The ventral 



scales are larger than the dorsals, and perfectly smooth. 



The caudals are the largest of all, and are very strongly 



keeled and mucronate. The number of femoral pores 



ranges from nine to thirteen. The color of the throats 



of the males varies from canary yellow to deep Chinese 



orange. 



