4:16 MR. G. A. BOULENGER ON THE VARIETIES OF 



collar in males, the wrist or elbow of the ad pressed fore limb, or the axilla, in females ; 

 the length of the foot is once and one-sixth to once and one-third the length of the 

 head. 



The lepidosis is the same as in specimens from Spain and Portugal. Four is the 

 normal number of upper labial shields in advance of the subocular J ; the series of 

 granules between the supraciliaries and the principal supraoculars is complete or the 

 first supraciliary is in contact with the second supraocular; the parietal shield is 

 usually in contact with the upper postocular 2 ; the masseteric shield is usually present, 

 and often large, in the Moroccan specimens, and usually absent in those from Algeria. 

 The edge of the collar shows no trace of denticulation, forming a perfectly even border 3 ; 

 23 to 30 scales and granules along the middle line between the symphysis of the 

 chin-shields and the median collar. The scales on the back are smooth or faintly 

 keeled, 53 to 68 in number across the middle of the body, 3 and 4 transverse series 

 corresponding to the length of a ventral shield, 40 to 60 to the length of the head. 

 Ventral plates in 6 or 8 longitudinal, and 25 to 32 transverse series. Anal plate 

 usually bordered by a single semicircle of small plates, rarely by two. Scales on upper 

 surface of tibia a little smaller than dorsals ; 16 to 22 femoral pores on each side ; 

 22 to 28 lamellar scales under the fourth toe. Upper caudal scales rather strongly 

 keeled, truncate ; 26 to 34 scales in the fourth or fifth whorl behind the granules of 

 the anal region. 



Doumergue describes the Oran specimens as yellowish green above, with a 

 greenish-yellow dorso-lateral streak, bordering a brown lateral band, the belly 

 bluish white. In the Moroccan and Algerian specimens examined by me (in spirit), 

 the colour is brownish, grey, or yellowish green, with two more or less distinct 

 whitish streaks on each side, the upper extending to the supraciliary edge, the 

 lower passing through the eye, separated by a dark brown band or by crowded black 

 spots ; the dorsal space between these light streaks is at least as great on the body 

 as on the nape ; brown or black dorsal spots are often present on the back, but they 

 are irregularly disposed, or affect a paired disposition, never forming a vertebral line ; 

 upper surface of head uniform or spotted with black. Black ventral spots, if present, 

 small and restricted to the sides. Tail with or without black and white spots, 

 which may be very conspicuous and regular on the sides. 



In the pattern of coloration, the North-African specimens often closely resemble the 

 var. liolejris from Spain, but a dark vertebral line or series of spots is invariably absent, 

 as in the Spanish and Portuguese specimens of the var. bocagei. 



1 One specimen from Tlemsen has 5 anterior upper labials on both sides ; there are 5 on one side only in 

 three specimens from the Tamaruth Valley, while there are only 3 on one side in a fourth. 



2 Nine exceptions from Tamaruth Yalley, one from Sersou. 



3 The collar- shields are very small and irregular in two specimens from Aumale. 



