Opiiiops. 



209 



scales ; no gular fold ; 14 to 18 gular scales in a straight line, incluiliug 

 the median collar-plate. 



Dorsal scales very large and sharply keeled, larger than the laterals, 

 and but little if at all smaller than the caudals. Ventral plates 

 broader than long, in 6 or 8 longitudinal series according as to whether 

 or not the outer, smooth but smaller plate is reckoned as a dorsal 

 scale, and 23 to 29 transverse series (23 to 26 in males, 25 to 29 in 

 females). 26 to 30 scales and plates round the middle of the body.* 

 Preanal plate rather large, bordered by two or three semicircles of 

 smaller plates. 



Scales on upper surface of tibia rhombic and keeled, small. 6 to 10 

 femoral pores on each side, usually 7 to 9. Subdigital lamellae 

 bicarinate, 19 to 23 under the fourth toe. 



Caudal scales strongly keeled, upper lar-ger than lower, 14 to 18 in 

 the fourth or fifth whorl behind the postanal granules. 



Young olive with two whitish streaks on each side, the upper from 

 the sujterciliary edge to the base of the tail, the lower from the upper 

 labials, through the ear, to the groin. Adult bronzy brown or C)live 

 above, usually with two light streaks on each side, as in the young, or 

 at least with traces of them, the dorsolateral edged with dark brown 

 or blackish on the inner side, often with a dark vertebral streak on 

 the nape ; sides brown or greenish, often with more or less crowded 

 small blackish spots. Lower parts white. 



Measurements (in millimetres) : 



From end of snout to vent 



„ fore limb 

 Length of head 



Width of head .... 

 Depth of head .... 

 Fore limb .... 



Hind limb .... 



Foot 



Tail 



1. (J, Youkous (type). 

 4. 9 . Tamesmida. 



S , Batua. 3. 9 , Portes de Fer (type). 



^ Kralfalla, Prov. Oran 

 „ Portes de Fer, Algiers 



Particulars of Specimens E.raniined. 



1. 2. 



. 40 26 



. 42 30 



* 24 to 28 in specimens from Cyren.aica, accordin<f to Werner. 

 VOL. tl. 14 



