226 G. A. BOULENGER ON 



longer than broad ; prefrontals forming an extensive suture ; frontal a little shorter 

 than its distance from the end of the snout, if times as long as broad, narrower be- 

 hind than in front ; parietals if times as long as broad ; interparietal ij to if times 

 as long as broad, separated from the very small occipital by the parietals meeting 

 in the middle. 4 supraoculars, first very small, second longer than the third, fourth 

 small but larger than the first ; 3 superciliaries, first and second elongate ; a complete 

 series of granules between the supraoculars and the superciliaries. Nasal usually 

 forming a suture with its fellow behind the rostral l and in contact with the anterior 

 loieal above the postnasal, unless its posterior portion be detached to form a second 

 postnasal ; l anterior loreal as long as or shorter than the second ; 4 upper labials i 

 anterior to the subocular, which is not or but little narrower beneath than above. 

 Temporal scales very small, granular, obtusely keeled, 12 on a line between the orbit 

 and the tympanum ; a feebly enlarged anterior upper temporal ; a very narrow 

 tympanic shield. 



4 pairs of chin-shields, 1 the 3 anterior in contact in the middle. 22 to 24 gular 

 scales in the median line, anterior granular and faintly keeled, posterior increasing in 

 size, imbricate, keeled, and merging gradually into the plates of the very distinct 

 collar, which are pointed, keeled, and 10 to 12 in number. 



Dorsal plates obtusely pointed or rounded behind, in 7 or 8 longitudinal series 

 on the body, the median smaller. ■' Ventral plates obtusely pointed and mucronate, 

 very strongly keeled, in 6 longitudinal and 27 or 28 transverse series. 2 or 3 series 

 of keeled scales on the side above the ventral plates, separated from the dorsals by a 

 broad granular area. 28 to 32 plates and scales round the middle of the body. 

 Prseanal plate rather larger , ,; bicarinate, with one or two smaller keeled plates on each 

 side. 



Upper surface of limbs with rhombic keeled scales. A single femoral pore on 

 each side. Subdigital lamellae single, or partly single and partly paired, 24 under 

 the fourth toe. 



Caudal sca'es strongly keeled and shortly mucronate, in subequal whorls, the 

 fourth containing 12 or 14 scales. 



Bright green above ; a white streak along each side, from the upper lip to the 

 groin, passing below the tympanum and along the upper half of the outer row of 

 ventral plates, continued on the base of the tail. I v imbs and tail often reddish. 

 One of the specimens described by Van Denburgh has a dark red-brown band along 

 the side, from the eye, just above the white streak, to the tail, where it spreads over 

 the upper surface. Lower parts white. 



1 Rostral in contact with the frontonasal in 2 specimens out of 51 examined by Van Denburgh. 



2 As in one of the two specimens here described. 



3 5 in the type specimen described by Van Denburgh. 



* 5 in one specimen, 3 — 4 in another, according to Van Denburgh. 



6 According to Van Denburgh, there are usually two median series of small plates anteriorly and one posteriorly, or 

 1—2 — i , 2—1 — o, i throughout, or 1 — o. One specimen has only 1 row of large plates on each side of the back, separated 

 by about 7 rows of smaller, irregular plates 



6 Exceptionally divided, according to Van Denburgh. 



