Psammoclromns. 169 



tliau the others, all iu contact with the supraoculars. Rostral uanowly 

 separated from the uostril ; a single postnasal ; anterior loreal shorter 

 than second* ; four, rarely five or three t upper labials anterior to the 

 subocular, which is much narrower beneath than above, and the lower 

 portion of which is often detached as one or two additional labials 

 sej>arating it from the oral l)ordor ; one, two or three enlarged upper 

 temporals often present J ; the other temporal scales irregular aud 

 unequal in size, usually with a distinct tympanic shield. Lower eyelid 

 without vertically enlarged scales iu the middle. 



Grular scales large aud flat, larger and more iml)ricate towards the 

 collar, which is rather feebly or very feebly marked, except on the 

 sides, and formed of 6 to 10 rounded scales ; gular fold usually more 

 or less distinct, at least on the sides ; 15 to 22 gular scales iu a 

 straight median line, including the collar. 



Scales on back acutely pointed or shortly mucronate, with strong- 

 straight keels, on sides graduallj' moi-e obtuse aud losing the keels, 

 gradually passing into the veutials, which are broader than long, aud 

 hexagonal, those of the second series from the median line l>roadest, 

 and form straight longitudinal aud transverse series. 24 to 36 scales 

 across the middle of the body. Ventral plates in 6 longitudinal aud 

 24 to 31 transverse series (24 to 30 iu males, 27 to 31 in females). 

 Preanal plate moderate or rather large, liordered by one or two semi- 

 circles of small plates. 



Scales on upper surface of tibia rhombic and keeled. 9 to 14 

 femoral pores on each side,§ usually 10 to 12. 16 to 23 lamellar 

 scales under the fourth toe. 



Caudal scales in nearly equal or alternately somewhat longer aud 

 shorter whorls, upper strougly keeled, pointed, aud moi'e or less 

 distinctly mucrouate ; 18 to 24 scales in the finirtb or fifth whoil 

 behind the postanal granules. 



txrey, olive, coppery brown or ^yellowish brown above, usuallv with 

 white or yellowish aud black markings in the form of spots, streaks, 

 or ocelli. Primarily, there are four white streaks on the back and 

 three ou each side; the outer dorsal, or dorsolateral, starting from 

 the outer border of the parietal shield, and the middle lateral, starting 

 from the upper lip, are the most constant ; the upper lateral, starting 



* Absent iu a femiile from Marseilles. 



t ') on one side in two males from Seville, 3 on both sides in a male and in a 

 female from the same locality. 



} Anterior upper temporal in contact with tlie foiuth supraocular in a male 

 from Seville, in a male and in a female from Lisbon, in a female from Alyarve. 



§ Up to 15 according to Duges. 



