402 ' ' ' SAURIA. 



region are about equal sized with those of the pectoral region. Under 

 the base of the tail, the scales are likewise smooth ; and, in the male 

 sex, they are larger immediately behind the vent than elsewhere. 

 Along the conical portion of the tail, the scales underneath are slightly 

 keeled. 



The ground color is greyish-brown above, with a black patch on 

 each side of the neck. Three transverse blotches of black, inter- 

 rupted upon the middle region of the back, exhibit posteriorly two 

 light spots. Four transverse and similar bands may be traced along 

 the caudal region. The limbs are likewise barred with black. The 

 inferior region is yellowish ; the head, belly, and tail, scattered all 

 over with small blackish spots ; the limbs remaining unicolor. 



Log. — This species occurs in Upper California. 



Plate XX, fig. 10, represents the profile of the male sex of Batra- 

 chosoma coronatum, size of life. 



Fig. 11, is a view from above; and, 



Fig. 12, a view from beneath of the same individual, 



Fig. 13, being a front view of the head. 



Subgenus PHRYNOSOMA (WiEaM.), Grd. 



Gen. Char. — Head rather large ; vertex rather inclined forwards ; 

 snout rather protruding. Nostrils anterior, situated within the ex- 

 tension of the supraciliary ridge. Cephalic plates small and rugose; 

 spines very large. Submaxillar shields large, sharp-edged. Auri- 

 cular apertures extant. Two distant rows of mental scales more 

 developed than the rest, though rather small, and slightly keeled. 

 Sides of the neck rumpled ; throat transversely wrinkled. A pec- 

 toral or prescapular fold. Two horizontal series of subpyramidal 

 scales at the periphery of the abdomen. Abdominal scales carinated. 

 Coloration: yellowish or olivaceous, maculated above with black; 

 beneath unicolor, or spotted. 



SYN.—Tropidogasfer, Fitz. Syst. Kept, i, 1843, 79. 



Observ. — A genus Tropidogaster being already in existence amongst 



