REPTILES OF THE PACIFIC COAST. 137 



39. Cnemidophorus tigris undulatus (Hallowell). CALI- 

 FORNIA WHIPTAIL. 



Cnemidophorus undulatus, HALLOWELL, Proc. Ac. Nat. Sci. Phila., 



. VII, 1854, p. 94 (type locality "Fort Yuma, San Joaquin 



Valley," [=Fort Miller, Fresno County, Calif.]); HALLOW., 



Eept. U. S. Pac. R. R. Surv., X, pt. IV, 1859, p. 8, pi. IX, fig. 2. 



Cnemidophorus tigrvs undulatus, STEJNEGER, N. A. Fauna, No. 7, 

 p. 200. 



Description. Whole animal long and slender. Nos- 

 trils opening in large anterior nasal plates; latter meet- 

 ing on top of snout. Posterior nasal forming sutures 

 with anterior nasal, first, second and third labials, loreal, 

 prefrontal, and frontonasal plates. Loreal in contact 

 with third and fourth labials, first subocular, preocular, 

 first superciliary, prefrontal, posterior nasal, and first 

 supraocular plates. Four supraoculars, first and fourth 

 smaller than others. Second, third, and fourth supra- 

 oculars separated from superciliaries by small convex 

 granules. Similar granules between third and fourth 

 supraoculars and froutoparietal and parietal plates. 

 Behind parietals, two or three transverse series of small 

 occipitals. About five superior and six inferior labials 

 to a point below pupils. Sublabials large, and, except 

 first, separated from infralabials by small plates and 

 granules. Anterior gulars largest centrally, becoming 

 gradually smaller laterally and anteriorly, and changing 

 abruptly to smaller posterior gulars. Largest gular and 

 collar scales averaging smaller than in C. stejnegeri. 

 Scales on center of collar moderately large, those on its 

 edge smaller. Back covered with small, smooth, convex 

 granules slightly larger than in C. tigris. Ventral plates 

 in eight longitudinal rows. Several large plates, sur- 

 rounded by smaller plates and granules, in front of anal 

 opening. Posterior surface of forearm covered with 

 small, nearly equal-sized granules. Long slender tail 



