Nucras. 11 



long as broad, as long as its distance from the end of the snout ; 

 frontoparietals much shorter than the frontal ; parietals If to 2 times 

 as long as broad ; interparietal 2 to 3^ times as long as broad ; 

 occipital very small.* Four supraoculars,t first and fourth small, 

 first in contact with the frontal ; 4 or 5 superciliaries, in contact with 

 the Supraoculars. Two superposed postnasals ; anterior loreal not 

 half as long as second ; subocular not or but little narrower beneath 

 than above, between the fourth and fifth upper labials ; two large 

 upper temporals, first much longer than second and in contact with 

 the fourth supraocular, or separated from it by a small shield ; lower 

 temporal scales rather large, upper smaller and granular; a large 

 tympanic shield. 4 or 6 large and vertically elongate scales in the 

 middle of the lower eyelid. 



Parietal foramen and pterygoid teeth present. 



Grular scales much enlarged towards the collar, 18 to 21 between the 

 symphysis of the chin-shields and the median collar-plates ; no gular 

 fold. Collar serrated, composed of 7 to 10 plates. 



Scales on body granular, round or squarish, smooth, enlarged on 

 the lower part of the side aud passing gradually into the ventral 

 plates ; 42 to 45 scales across the middle. Ventral plates in 6 or 8 

 longitudinal and 28 or 29 transverse series in males, 32 in females. 

 Two large praeanal plates, one before the other, and a single semicircle 

 of smaller plates. 



A series of 7 or 8 transversely enlarged plates on the lower surface 

 of the fore-arm. Scales on upper surface of tibia smaller than dorsals. 

 10 to 12 femoral pores on each side. 17 to 20 lamellar scales under 

 the fourth toe. 



Upper caudal scales rather broad, slightly oblique, strongly keeled, 

 posterior border very obtusely pointed or rounded. 



The specimens examined differ in the coloration. The type of N. 

 emini, a half-grown male, is pale reddish-brown above, with very 

 small black dots and a faint trace of a light vertebral streak ; a black 

 lateral band from the eye to the root of the tail, edged with a light 

 streak above and beneath, and bearing a series of white spots with 

 a tendency to run together into a streak ; limbs with small dark 

 brown spots on vermiculations ; tail reddish ; lower parts white. The 

 other specimens agree better with Bolkay's figure of N. uJcerewensis. 

 Dark brown above, with a continuous or interrupted white vertebral 

 streak ; four series of small white, black-edged spots on each side, 

 the upper and lower corresponding to the light streaks of the pre- 



* Absent in the male from Bissel. 



+ Only 3 in the male from Bissel, the (normally) first being absent. 



