A ca n tJiodacfyl us. 



105 



small light or dark spots or dots ; females sometimes with a whitish 

 lateral streak edged below by a dark one rimuing along each side of 

 the belly and bearing a series of round white spots, exceptionally* with 

 four dorsal streaks darker than the ground-colour or bearing light 

 spots or whitish or bluish grey each with a series of black spots, and 

 with a black lateral streak on the tail ; such females evidently derived 

 from young bearing white longitudinal streaks ; other young merely 

 reticulate like many of the adults. t 

 Measurements (in millimetres) : 



Bou Saada. 



The habitat of this variety is confined to Tripoli, the Tunisian and 

 Algerian Sahara, whence it penetrates into the southern sandy parts 

 of the Plateaux. 



Var. DUMERILl, M.-Edwards. 



Resembles the var. inornatus in the small size, and the form of the 

 head and body, but foot longer, 1^ to 1^ times the length of the head ; 

 hind limb reaching the collar, or, usually, between the collar and the 

 ear ; tail 1.] to 2 times length of head and body. 



Frontal 2 to 2^ times as long as broad ; parietals always broader 

 than long ; first supraocular often with one to three small shields 

 detached from it on the inner side, fourth often disintegrated into 

 small shields and granules ; 5 or 6 superciliaries ; one series of granules 

 between the supraoculars and the superciliaries, or one in front and 

 two behind ; subocular resting on the fourth, fifth and sixth, or 

 fifth, sixth and seventh, rarely fourth and fifth, upper labials ; 3 to 5 

 rounded or obtusely pointed auricular lobules ; 20 to 30 (usually 

 22 to 27) gular scales in a straight line. Dorsal scales rhombic, 



* Three from Bou Saada, six from Am Sefra. 



t As in A. pardalis, young specimens appear to be seldom met with. 



