186 LacerU,];,: 



Bodv rather si ioiil;1_v depressed. Head uioderately depressed, 1^ to 

 I3 times as luu>>- as broad, its depth equal to the distance l>et\veeii the 

 anterior corner or the centre of the eye and the tympanum, its length 

 3i to 3| times in length to vent in males, 4 to 4J times in females ; 

 snout pointed, as long as the postocular part of the head, with sharp 

 canthus and concave loreal region ; a lanceolate concavity on the upper 

 surface of the snout and the anterior half of tlie frontal ; a strong 

 keel l)elow the eye. Pileus 2 to '2\ times as long as broad. Neck as 

 ])road as or a little narrower than the head. The hind limb reaches 

 between the shoulder and the ear in males, the axil or the shoulder in 

 females; foot a little longer than the head; digits feebly compressed. 

 Tail \\ to 2 times as long as head and l)ody. 



Upper head-shields strongly and coarsely striated and keeled ; 

 nosti-il between three shields; nasals forming a suture behind the 

 rostral ; frontonasal broader than long ; prefrontals longer than broad, 

 not reaching the first large supraocular, forming an extensive meilian 

 suture; frontal as long as or a little shorter than its distance fiom the 

 end of the snout, 1| to 2\ times as long as broad, narrower behind 

 than in front ; parietals longer than broad, rounded behind ; inter- 

 parietal as large as the frontoparietals, in contact with or narrowly 

 separated from a much shorter occipital, the posterior border of which 

 is rounded and projects beyond the parietals. Two large supra- 

 oculars, preceded and followed by small keeled scales ; first supra- 

 ocular as long as or a little shorter than its distance from the posterior 

 loreal, in contact with the posterior half of tlie frontal, second sometimes 

 narrowly in contact with the parietal ; 4 or 5 superciliaries, first longest 

 and forming a very oblique suture with the second; 1 or 2 series of 

 granular scales between the supraoculars and the superciliaries. Lower 

 nasal broadly in contact with the rostral ; postnasal small, between 

 the upper and lower nasals ; anterior loreal as long as or a little 

 shorter than second ; 4, rarely 5, upper labials anterior to the sub- 

 ocular, which is much narrower beneath than above, and borders 

 the mouth.* A large upper temporal ; temporal scales rather large, 

 hexagonal, strongly keeled ; a narrow tympanic shield. Lower eyelid 

 with a series of vertically enlarged scales in the middle. 



5 pairs of chin-shields, the 8 anterior in contact in the middle ; 

 gular scales imbricate, passing gradually into the ventral plates, 19 to 

 23 in a straight median line. 



Dorsal scales rhombic-lanceolate, strongly keeled, acutely pointed 

 or shortly mucronate, nearly as large as upper caudals ; lateral scales 



* In a male from Moeleni the lower part of the subociilar is cut off to form 

 a supplementary labial as in I. squamulosa. 



