CROCODILTANS, LIZARDS, AND SNAKES. 



355 



Seven dorsal scales in a head length, and twelve ventrals. Eighteen 

 scales between groin and humerus, and nine scales from above middle 

 of humerus to interparietal i)late. Four superior labial i^lates, the last 

 very narrow, and separated from the orbit by two lows of scales and a 

 narrow suborbital plate. A series of long, mucronate, chaffy scales in 

 front of the auricular meatus, which is followed by large chafity scales, 

 of which the posterior row overhangs a pocket which is lined with 

 granular scales. Limbs and digits rather short and robust, the longest 

 toe of the oppressed hind limb reaching the front of the auricular 

 meatus. 



Fig. 52. 



ScEi.opoKu.s oncuTTii Ste.inboer. 



X 3. 



Southern California. 



C-it. No. 51Si9, U.S.N.M. 



Measurements (Cat. No. 2It)22).— Total length, 225 mm. ; length to vent, 

 05 mm.; length to axilla (axial), 38 mm.; length to auricuhir meatus 

 (axial), 15 mm.; width of head at auricular meatus, 21 mm.; lengtli of 

 fore limb, 41 mm.; length of fore foot, 10 mm.; length of hind limb, 

 63 mm.; length of hind foot, 30 mm. 



The coloration of tliis species is peculiar and striking. The ground 

 on the middle dorsal region is browu, and on the sides blackish. In 

 smaller specimens there are transverse rows of whitish scales which 



