54 Lacerfidx. 



the head ; fourth toe, from the base of the fifth, as long as the head 

 or a little longer. Tail li to 1^ times as long as head and body. 



Upper head-shields convex. Suture between the nasals i to f the 

 length of the frontonasal, which is broader than long, and a little 

 broader than the internarial space ; prefrontals as long as broad or a 

 little longer than broad, and forming a median suture ; frontal as long 

 as or shorter than its distance from the end of the snout. If to 2 times 

 as long as broad, rounded or truncate in front, narrow behind ; 

 parietals as long as broad, outer border straight or concave. Two 

 large supraoculars, preceded and followed by small shields* and 

 granules as in .4. vulgaris and bordered on the outer side by one or two 

 series of granules ; the anterior supraocular as long as or a little 

 longer than its distance from the second loreal ; 6 or 7 superciliaries, 

 first longest. Anterior loreal much shorter than second; 4 upper 

 labialst anterior to the subocular, fourth longest ; subocular sharply 

 keeled below the eye, entering the oral border, often rather largely, 

 between the fourth and fifth upper labials. A large, keeled upper 

 temporal, usually followed by a smaller one ; temporal scales granular, 

 convex, upper minute, lower much larger; tympanic shield usually 

 present ; auricular denticulation absent or very slightly indicated. 



5 pairs of chin-shields, the three first in contact in the middle. 

 19 to 26 gular scales in a straight line between the symphysis of the 

 chin-shields and the median collar-plate, juxtaposed in front, enlarged 

 and imbricate towards the collar ; gular fold absent. Collar free or 

 attached in the middle, curved or angular, composed of 7 to 11 plates. 



Scales granular on the nape and sides, larger and flat, round and 

 juxtaposed or subimbricate on the back, largest and often pointed 

 towards the ventrals, all perfectly smooth ; 58 to 65 scales acros» the 

 middle of the body. Ventral plates in regular longitudinal and 

 transverse series, all except the outermost much broader than long, the 

 largest fully twice as broad as long, in 10 longitudinal and 2i;; to 33 

 transverse series. 3 to 5 transversely enlarged preanal plates in a 

 median series. 



18 to 24 femoral pores on each side, the two series meeting or very 

 narrowly separated in the middle. Digits with 3 series of scales, very 

 feebly denticulate on each side ; 19 to 22 tricarinate lamellse under 

 the fourth toe. 



Posterior caudal scales feebly keeled, oblique and longer than broad, 

 the basals perfectly smooth and as long as broad ; 28 to 38 scales in 

 the fourth or fifth whorl. 



* The first supi-aocular sometimes represented by 2 or 3 shields only, 

 t 3 on one side in a female from Mt. Hermon. 



