49 



Var. LINEOMACIJLATUS, D. & B. 



Head often a little more elongate than in the preceding forms, \\ to 

 If times as long as broad ; foot usually a little longer, up to If times 

 the length of the head. Tail 1| to 2 times as long as head and body. 

 Suture between the nasals i to \, rarely -i, the length of the fronto- 

 nasal, which may be nearly as long as broad and is often divided into 

 two by a longitudinal cleft * ; very frequently one or two azygos 

 shields between the prefrontals t ; parietals sometimes a little longer 

 than -broad ; anterior supraocular sometimes a little shorter than its 

 distance from the posterior loreal ; often 2 or 3 series of granules 

 between the supraoculars and the superciliaries, which are 5 or 6 in 

 number ; subocular very rarely reaching the oral border.J wedged 

 in between the fourth and fifth or fifth and sixth upper labials ; 

 temporal scales often distinctly keeled ; 4 or 5 scales often form a 

 feeble but very distinct denticulation in front of the tympanum. 

 Gular fold sometimes very distinct. § Dorsal scales rhombic, flat 

 and subimbricate, with strong and sharply defined keels, from the 

 nape or from between the shoulders, often passing gradually into the 

 caudals ; sometimes a band of enlarged scales on each side of the 

 posterior part of the back, proceeding from the basal caudals. 



* In 8 out of the 26 specimens before me ; in 67 p. c. of the specimens from 

 Casablanca described by Boettger. 



t One in 13 specimens, two in 4; one in 27 p. c. and two in 59 p. c. of 

 Boettger's Casablanca specimens. 



t Only once, and on one side only, in the specimens before me. In my 

 description of 38 specimens from Tangier, in 1878, 1 stated this condition to 

 be exceptional. 



§ Especially in one specimen from Mogador. 

 VOL. II. 4 



