328 Laceriichv. 



as long as or shorter tliau aud as broad as or broader tliau the inter- 

 parietal, sometimes twice as broad as the latter and as broad as the 

 frontal. The two major supraoculars, of which the first is neai-ly 

 always the longer, separated from the superciliaries by a complete 

 series of granules ; first supraocular small, sometimes broken up into 

 two, never in contact with the frontal ; fourth also small and some- 

 times broken up into two. 6 or 7 superciliaries, first largest, the suture 

 between first and second as often oblique as vertical. 



Two superposed postnasals ; 2 loreals, first shorter than second. A 

 rather large semitransparent area in the lower eyelid, with 5 or 6 

 vertically elongate shields. 5 (rarely 4) upper labials anterior to the 

 subocular, the lower border of which is often not or but slightly shorter 

 than the upper, although liable to as much variation of form as in the 

 typical L. muralis. Temporal region covered with granviles, or granules 

 and irregular small shields ; masseteric shield absent * tympanic 

 present, sometimes preceded by a second, similar shield ; upper 

 temporal absent. 



No pterygoid teeth. t 



25 to 38 (usually 28 to 32) scales and granules in a straight line 

 between the symphysis of the chin-shields and the median collar- 

 plate ; gular fold distinct ; collar not serrated, composed of 7 to 13 

 plates (usually 9 to 11). 



Scales on body granular, round or suboval, smooth or very faintly 

 keeled, a little larger on the sides than on the back, 51 to 81 (usually 

 60 to 70) across middle of body, 3 or 4 transverse series corresponding 

 to a ventral plate, '67 to 60 in the middle of the back corresponding to 

 the length of the head. Ventral plates in 6 (very rarely 8 J) longitu- 

 dinal and 24 to 31 transverse series (24 to 28 in J , 25 to 31 in 9 ) ; 

 the plates of the two median series narrower, often much narrower, 

 than those next to them. Preanal plate usually large, but variable in 

 size, bordei'ed by one or two semicircles of small plates. 



Scales on upper surface of tibia granular, smooth, usually smaller 

 than those on the back, rarely nearly as large. 25 to 33 lamellar 

 scales under the fourth toe. 16 to 24 femoral pores on each side (12 

 to 19 in specimens from Great Salvage). 



Caudal scales narrow, truncate or very obtusely pointed, the upper 

 obtusely or rather strongly keeled, the lower usually feebly keeled, the 

 keels straight ; the whorls markedly longer aud shorter alternately ; 



* Present in a male from Graciosa, Azores, 

 t Sometimes present according to Bedriaga. 



I In a female from Madeira (Macgillivray) and in another from Paul; these 

 uter plates very small, but as long as the adjacent plates. 



