Psammodroimts. 165 



bot. Ges. Wien, xlii, 1892, p. 354; Douiuergue, Evp. Oran. p. 136, 

 pi. ix, figs. 4, 5 (1901). 



Body moderately depressed. Head small, feebly depressed, convex 

 on the occiput, 1-^ to 1| times as long as broad, its depth equal to the 

 distance between the anterior corner of the eye and the tympanum, 

 its length 4 to 4§ times in length to vent; snout obtusely pointed, with 

 strong canthus and concave loreal region, a little shorter than postocular 

 part of head ; a sharp keel below the eye, on the freno-ocular and 

 subocular shields. Neck as broad as or a little broader than the head. 

 The hind liml) reaches the wrist of the adpressed fore limb in females, 

 the elbow, the axil, or the shouldei- in males ; foot 1^ to Ij times 

 length of head ; digits feebly compressed, witli tubercular lamellae 

 inferiorlj (the tubercles in two series, except distally). Tail Ih to 2 

 times as long as head and body. 



Pterygoid teeth absent. 



Nostril separated from the postnasal and from the first upper labial 

 by a narrow rim * ; nasals forming a short or very short suture behind 

 the rostral f ; frontonasal broader than long ; prefrontals forming an 

 extensive median suture ; frontal If to 2 times as long as broad, as 

 long as its distance from the end of the snout, narrower behiud than 

 in front, lateral borders concave ; parietals as long as broad or slightly 

 longer, with convex outer border ; interparietal 1|^ to 2 times as long 

 as broad, sometimes very small and separated from the occipital by 

 the parietals meeting on the median line or by a small supplementary 

 shield X ; occipital shorter and not or but slightly broader than the 

 interparietal, sometimes minute. Four supraoculars ; first very small, 

 or reduced to a grauule, § second longer than third, fourth small but 

 usually larger than first, usually separated from the frontoparietal || ; 

 four superciliaries, very rarely five, second much longer than the others, 

 all in contact with the supraoculars. Rostral narrowly separated from 

 the nostril ; a single, small postnasal ; anterior loreal as long as or shorter 

 than second T[ ; four upper labials anterior to the subocular, which is 

 much narrower beneath than above; one or two upper temporals**; 



* As in L. perspicillata. 



t Rostral in contact with tlie frontonasal in a male from Tunisia. 



^ Two females from Lambesa ; one of these has the frontal divided into 

 two by a horizontal suture. 



§ Absent in one specimen examined by Bedriaga ; also, on one side, in a 

 female from Lambesa (Werner). 



II In 10 specimens out of 12 examined. This peculiarity is also frequent in 

 Lacerla vivipara. 



^ A single loreal in a male from Algiers. 



** The anterior only exceptionally in contact with the fourth supraocular 

 (male from Algiers, female from Lambesa). 



