Ichnotropis, 183 



Bodv modei'ately depressed. Head rather feebly depressed, 1^ to 



If times as long as broad, its depth equal to the distance between the 



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



3f to 4 times in length to vent in males, 41 to 4f times in females ; 



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



canthus and concave loreal region ; a rather deep concavity on the 



upper surface of the snout and on the frontal, between two strong 



keels ; an obtuse keel below the eye. Pileus 2 to 2 J times as long as 



broad. Neck as broad as or a little narrower than the h.ead. The 



hind limb reaches the axil or the shoulder in males, the elbow or the 



axil in females ; foot as long as or a little longer than the head ; 



digits feebly compressed. Tail \h to 2 times as long as head and body. 



Upper head-shields strongly and coarsely striated and keeled ; 



nostril between three shields ; nasals forming a suture behind the 



rostral ; frontonasal as long as broad or a little broader than long ; 



prefrontals much longer than broad, usually in contact with the 



anterior of the two large supraoculars, and forming an e.xtensive 



median suture * ; frontal as long as or a little shorter than its distance 



from the end of the snout, 2 to 2J times as long as broad, of equal 



width throughout or a little narrower behind than in front ; parietals 



IJ to 2 times as long as broad, rounded or oblicjuely truncate behind ; 



interparietal as large as or larger than the frontoparietals, usually in 



contact with a shorter occipital, which may be large or small, and the 



posterior border of which is rounded and projects beyond the parietals; 



occipital exceptionally bi'oken up into scales. 4 supraoculars, the 



first small or broken up into 2 to 5 shields; anterior large supraocular 



longer than its distance from the second loreal, second usually in 



contact with the parietal ; 4, rarely 5, superciliaries, first longest and 



forming a very oblique suture with the second ; one, rarely two, series 



of small 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 much shorter than second; 



4, rarely 5 or 6, upper labials anterior to the subocular, which is 



much narrower beneath than above, and borders the mouth. t An 



enlarged upper temporal usually present, sometimes separated from 



the parietals by small shields ; 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 ; 



* Separated by two azygos shields in a male from Caconda. 

 t In a male from Caconda, the lower part of the right subocular is cut off to 

 form an additional upper labial. 



