HERPETOLOGY OF LOWER CALIFORNIA. I03 



Type. — Cal. Acad. Sci. No. 633, Comondu, Lower 

 California, W. E. Bryant, April, 1889. 



Description of the Type. — The head is broad, short, and 

 depressed. The snout is short and truncate. The nos- 

 trils are large, superior, and much nearer to the end of 

 the snout than to the orbit. The ear opening is large, 

 and has an anterior denticulation of three pointed scales. 

 The head scales are smooth, and slightly convex ante- 

 riorly. The rostral is very broad and low, with a median 

 superior projection. The frontal is transversely divided. 

 The largest supraoculars are separated from the frontals, 

 frontoparietals, and parietals, by two series of small 

 plates. The interparietal is very large. There are five 

 superior and seven inferior labials to below the middle of 

 the eye. There are several series of enlarged sublabials. 

 The gular region is covered with small granules which 

 are slightly largest centrally. There is a weak anterior 

 gular fold followed by a strong posterior fold. The latter 

 is covered with small subgranular plates, the largest of 

 which, on its edge, are about equal in size to the first 

 scales on the chest. The back and sides are covered 

 with round granules, which are larger medially than 

 laterally. The tail is somewhat depressed and expanded 

 at its base, and is covered with whorls of small weakly 

 keeled scales. The scales on the anterior surfaces of 

 the limbs are large and weakly keeled. The ventral 

 plates are larger than the caudals. 



The color above is dull grayish olive, with four distinct 

 anterior, and three fainter posterior, transverse black 

 bands. The tail is similarly barred with dusky. The 

 throat is brownish marked with blackish slate centrally. 

 The chest and abdomen are white clouded with slate. 



