104 Laceiiii-Iie. 



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 112 85 



Habitat. — Cape Jubi, Southern Morocco, and Eio de Oro, Spanish 

 Sahara. 



Var. LNOENATUS, Gray (exvjvug, Lataste;. 



Size smaller than in the typical form, not exceeding 60 miUim. 

 from snout to vent. Head usually less than 4 times in length to 

 vent. Snout a little shorter, usually less than once and a half the 

 length of postocular part of head, the keels bordering the depression 

 in the prefrontals and frontal plates usually stronger; hind limb 

 rarely reaching the eye in the males,'' usually the collar or between 

 the collar and the ear, the shoulder, the collar, or between the collar 

 and the ear in females ; foot 1|^ to \\ times as long as the head, fourth 

 toe not or but slightly longer than the head. Tail li to 2 times as 

 long as head and body. 



Prefrontals 14 to 1| times as long as broad ; frontal Is to 2 times 

 as long as broad ; subocular usually resting on fourth, fifth and sixth 

 upper labials, rarely on fifth, sixth, and seventh, or fourth and fifth ; 

 auricular lobules sometimes ab.sent, sometimes rather long and pointed. 

 Scales usually more rhombic or flat than granular, more or less 

 strongly keeled, rarely feebly keeled,t 40 to 65, usually 46 to 58, 

 across the middle of the body. Ventrals sometimes forming more 

 regular longitudinal series, usually 14, rarely 12 or 16, in number ; 

 29 to 35 transverse series ; in some of the specimens most of the 

 ventrals decidedly broader than long. 23 to 37 Cfular scales in a 

 straight line. 16 to 25 femoral pores on each side, usually 17 to 23. 

 18 to 25 lamellae under the fourth toe. 22 to 35 scales in the fourth 

 or fifth caudal whorl. 



Pale crrey or yellowish or reddish sand-colour, or almost brick-red, 

 sometimes uniform, more often with a darker reticulation or with 



' JIale from Ain Sefra. 

 t Female from Bou Saada. 



