328 XANIUSIIDE. 
fourths in head and body. Colour above dark brownish yellow, 
varied with blackish spots on single scales ; a yellowish line on each 
side of the neck, with two others on the nape, making four parallel 
ones; underparts whitish. Young vermiculated with yellowish on 
a brown ground. 
Head and body about 50 millim. long. 
Fort Tejon, California. 
2, Xantusia riversiana. 
Xantusia riversiana, Cope, J. c. p. 29. 
Eye rather large, its diameter more than half the length of the 
snout; vertical diameter of the ear-opening a little less. Nostril 
situated in a small scute at the junction of the sutures which sepa- 
rate the internasal, rostral, first labial, and loreal scuta; three 
loreals, increasing in size posteriorly; frontonasal nearly square ; 
azygos prefrontal hexagonal, broader than long; interparietal as 
large as each frontoparictal; a single large temporal bounds the 
frontoparietal and parietal, and it is followed by two small scuta 
which are in contact with the parietal; eight upper labials, fifth 
largest ; posterior labials small, separated by nine rows of still 
smaller scales from the large temporal. Scales of the gular region 
flat and hexagonal, one row on the gular fold a little larger, and 
equal to the anterior gulars. Scales of the dorsal and lateral regions 
rather coarsely and uniformly granular, not keeled; ventrals qua- 
drate, in sixteen longitudinal and thirty-two transverse series. 
Przeanal scales in three transverse rows, the anterior two of four 
scales, with the median pair in both much enlarged, and the poste- 
rior row of six scales, Hind limb remarkably short; it reaches 
the elbow of the adpressed fore limb; the first digits of both ex- 
tremities very short ; scales on the anterior aspects of the fore-leg 
and femur larger than the others, those of the tibia small, and those 
of the posterior face of the femur still smaller. Femoral pores 
twelve on each side. Tail compressed, with a flat inferior surface ; 
svales of equal size, in whorls of equal width, convex but not keeled. 
Colour light brown, with dark umber-brown spots on the superior 
surface; dark brown bands cross the snout and form a wide UY on 
the back of the head; sides of head with rather large brown spots; 
inferior surfaces with minute brown spots which are least numerous 
on the middle line ; tail with irregular pale spots. 
millim, millim. 
Total length ...... 118 Fore limb ........ 17 
Cady sca acne es 16 Hind limb........ 23 
Width of head .... 11°5 TaG ce peti gh tw 6 58 
Body ke ouawnsest 44 
California. 
