CROCODILIANS, LIZARDS, AND SNAKES. 



555 



AMCEBOPSIS GILBERTII Van Denburgh. 



Am(rhoj}sis (I'llhertii Copk, Anier, Naturalist, 1895, p. 758. 



Xantusia gilhertii Van Dknuuhgh, Proc. Cal. Acad. Sci., 1895, p. 121, pi. xi. 



I only kuow this interesting species from the description and figure 

 given by Mr. Van Denburgh, which I liere transcribe. The eye is very 

 small, without lids, and with vertical pupil. Tbe nostrils are pierced 

 at tbe junction of the rostral, internasal, first superior labial, and first 

 loreal plates. There are 3 loreals, increasing in size posteriorly. 

 There are 2 internasals. The 2 frontonasals are separated by the inter- 

 frontonasal, which is in contact also with the 2 frontal plates. The 

 other head plates are 2 frontoparietals, 2 parietals, 2 large occipitals, 

 and 1 interparietal. The eye is surrounded by a ring of small scales, 



Fig. 101. 



AMCEBOPSIS GILBERTII VAN DENBURGH. 

 X2.5. 



Lower Calitbrnia. 



From Van Denburgh. 



of which the superciliaries are largest. This ring is separated from 

 the third loreal by 2 small scales. There are 8 superior and 8 inferior 

 hibials. The anterior border of the ear is slightly denticulate. The 

 ventral plates are arranged in 32 transverse and 10 or 12 longitudinal 

 series. The caudal scales are smooth, convex, and in whorls of about 

 equal length. The back and sides are covered with smooth convex 

 granules of about uniform size. There are 8 and femoral pores. The 

 gular regions are covered with smooth, flattened, subhexagonal gran- 

 ules, which are slightly larger than those on the back and sides. 



The color above is dark brownish clay dotted with black on single 

 granules. A pale yellowish line, two granules wide, runs posteriorly 

 from each occipital plate, but is soon lost on the back to reappear over 

 the thigh. 



Measurements. — Length to vent (about), 39 mm. ; tail (about), 38 mm. ; 

 hind limb, 14 mm.; fore limb, 10 mm.; diameter of eye, 1 -f mm.; 



