o2S XANirsJiDJi. 



fourths in head and body. Colour above dark brownish yellow, 

 varied with blackish spots on single scales ; a yellowish line on each 

 Bide 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 naillim. long. 



Fort Tejon, California. 



2. Xantusia riversiana. 

 Xantusia riversiana, Cope, I. 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 iuternasal, rostral, first labial, and loreal scuta ; three 

 loreals, increasing in size posteriorly ; frontonasal nearly square ; 

 azygos pra^frontal hexagonal, broader than long; interparietal as 

 large as each frontoparietal; 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. 

 Prasanal 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 ou 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 ; 

 scales 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 U 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 



Head 16 Hind limb 23 



Width of head .... 11-5 Tail 58 



Body 44 



California. 



