1911] Bryant: Horned Lizards of California and Nevada 39 
of the gular region (pl. 5, fig. 11). These rows form an apex at 
the front of the jaw and continue posteriorly onto the gular 
folds. The head shields are flat, nearly equal-sized, with 
numerous ridges and dark-colored granulations (pl. 5, fig. 11). 
Four or more bony tuberosities are to be found on the parietal 
region in front of the occipital spines. The temporal horns are 
four to six in number on each side, the posterior ones being much 
the largest. The large spinose sublabials number five or six on 
each side. Below the rictus is a large broad spine followed by 
w smaller conical one. On each side of the neck are two groups 
of spines. The lower group is slightly the larger. 
The back and tail are covered with large scattered scales which 
are elevated, keeled, and tubercular, and set among smaller scales 
and granules. The ventral scales are smooth and equal-sized 
except on the terminal part of the tail, where they become keeled. 
A single row of lateral trihedral spines fringes the tail, which 
possesses a small group of slender spines just behind the thigh. 
On the anterior portion of the arm and thigh the seales are large, 
pointed, and keeled. The tympanum is not covered with seales. 
A long series (12-18) of femoral pores is present. Males have 
enlarged postanal plates (pl. 5, fig. 12). See table of measure- 
ments for dimensions and proportions of the lizard. 
The coloration is usually gray or slate to brown, rarely to red. 
A large brown patch on each side of the neck is darker around 
the upper edges (pl. 5, fig. 11). Large dark brown cross-bands, 
posteriorly edged with a light band, usually eight in number, are 
found on the back and tail. The keels of the enlarged tubercular 
scales of the back are generally dark brown in color. The head 
is yellowish white or slaty gray. On the ventral surface the pre- 
vailing color is yellow or yellowish white with irregular black 
blotches (pl. 5, fig. 11). For general color pattern see plate 5, 
figure 11. 
The sole character on which Van Denburgh (1897) based his 
description of this form as a new species, was upon the appear- 
ance of the head plates, those of blainvillei being convex and 
almost smooth, whereas those of frontale, are flat, ridged, and 
granulated. In addition I have found that several enlarged 
