46 University of California Publications in Zoology [Vou.9 
The general color above is white, gray, or yellow, marbled 
with brown to black, with ofttimes red markings. The neck 
patches nearly meet on the median line near the occiput, are 
short and wide, and often faded in the older specimens. Obscure 
cross-bands are to be found on the limbs and tail. The head is 
usually dotted with black, brown, or red. The lower surface is 
whitish to yellow and usually spotted with black. For general 
color pattern see plate 5, figure 13. 
OSTEOLOGY 
Diagnostic Characters—Horns of occipital region medium 
sized (5-7 mm.), flattened and grooved; interoccipital horn a 
small tuberosity; supratemporal horns, three on each element, 
posterior ones pointing in almost the same direction as the oecip- 
itals; jugals with four or five tuberosities; parietal region with 
three bony tuberosities, in the shape of a triangle, back of the 
pineal foramen; the edge of the frontal forming the arch over 
the orbits with elevated plate-like processes; superciliary pro- 
cesses from prefrontals and frontals about equal in length and 
not meeting; quadrates short and wide (4x2 mm.) ; two to five 
bony processes on each side of the lower mandible; articulars 
partly ossified to surangulars; slight evidence of dorsal erest ; 
third sternal ribs attached to xiphoid rods near their base; post- 
temporal openings small; supratemporal openings about twice 
as wide as long. 
Description —tThe alveolar portion of the premaxillary (pre- 
max., fig. E) borders the orbit for only a very short distance. 
The superciliary processes from the prefrontals (prefron.) and 
frontal (fron.) are of about equal length and do not meet. A 
number of raised plate-like processes are to be found on the 
edge of the frontal bordering the posterior part of the orbit 
(orb.). The occipital horns (occ. h.) have their origins close 
together and are medium in size, flattened, and grooved. The 
interocecipital horn (interocc. h.) is represented by a small tuber- 
osity. The supratemporal horns (supratemp. h.) are three in 
number on each side. The posterior ones are the best developed 
and point in almost the same direction as the occipitals. Three 
to five tuberosities are found on each jugal (jug.). The vomers 
