PMtnmoclromus. 165 



bot. Ges. Wieu, xlii, 1892, p. o5-l; Doumergue, Erp. Oraii. p. 136, 

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



Body moderately depressed. Head small, feebly depressed, convex 

 ou the occiput, IJ to IJ 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 45 times iu 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 oi- a little broader than the head. 

 The hind limb reaches the wrist of the adpressed fore limb iu females, 

 the elbow, the axil, or the shoulder in males ; foot 1^ to ly times 

 length of head; digits feebly compressed, with tubercular lamella 

 iuferiorly (the tubercles in two series, except distally). Tail Ij 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 t ; 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 behind tliau 

 iu 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 + ; occipital shorter and not or but slightly broader than the 

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

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

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

 four superciliaries, very i-ai-ely five, second much longer than the others, 

 all iu contact with the supraoculars. Rostral narrowly separated from 

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

 than secondly; four upper labials anterior to the subocular, which is 

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



* As in L. perspicillata. 



+ Rostral in contact witli the frontonasal in a male from Tunisia. 



X 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). 



I 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 contait witli the fourth supraocular 

 (male from Algiers, female from Lambesa). 



