SPECIES OF THE GENUS XANTUSIA. 529 



17-18, 1894, and the habits observed were the same as 

 recorded there. 



Cabazon, Cal., Sept. 28, 1894. A single specimen, 

 secured after several hours searching, was shaken from 

 the dry leaves of a dead but still standing yucca about 

 two feet high. 



Xantusia gilberti Van D. 



Xantusia gilberti. 



1895, Van Denburgh, Pioc. Cal. Acad. Sci., vol. v, p. 121, pi. xi. 



Desa'iption. — The body is subcylindrical, with very 

 short limbs. The upper surface of the head is flattened, 

 curving towards the snout. There are three folds on the 

 throat, the anterior connecting the ears and encircling 

 the head. The nostril is pierced at the junction of the 

 rostral, internasal, postnasal, and first labial plates. The 

 rostral is in contact with the first labial and internasal 

 plates. The two internasals are followed by a large 

 frontonasal, which separates the prefrontal plates. Be- 

 hind the latter are two large frontals. Each of the two 

 frontoparietal plates forms sutures with one of the fron- 

 tals, the second and third superciliaries, first supratem- 

 poral, parietal, interparietal, and its fellow of the opposite 

 side. The parietal and the very large interparietal are 

 bordered behind by the two large occipitals. A row of 

 small supratemporal scutes lies along the outer edge of 

 the occipital and parietal plates. The two large loreals are 

 in contact below with the superior labials, and above with 

 the frontonasal and prefrontal plates. In front of the 

 first loreal is a large postnasal. A series of small plates, 

 the upper of which are the superciliaries, surrounds the 

 eye.* Between this ring and the larger loreal are two 

 small plates. There are five superior and four inferior 



*Most of these plates are united on the side of the head shown in the 

 figure, pi. xi. 



