74 Mr. G. A. Boulenger on a new Snake. 



Iguanognaihus Werneri. 



Snout very short, broad, rounded. Rostral twice as broad as 



deep, just visible from above; internasals small, trapezoid, as 



long as broad ; prefrontals as long as internasals, but twice as 



broad ; frontal once and one third as long as broad, twice as 



W^^W^^^^^^^^^ 



\ A 



.:^:| 



I road as the supraocular, longer than the distance from the tip 

 of the snout, shorter than the parietals ; three pra?oculars, tiie 

 middle onein contact with the posterior nasal; three postoculars; 

 temporals 2 + 2 ; eight upper labials, fourth entering tiie eye ; 

 four lower labials in contact with the anterior chin-shields, 

 which are much shorter than the posterior j latter separated 

 from each other by scales. Scales in 19 rows, smooth on the 

 body, striated and feebly keeled on the ischiadic region and 

 on the tail. Ventrals 136; anal divided; subcaudals 53. 

 Dark brown above, sides lighter, with vertical black bars 

 spotted with whitish ; head with whitish markings, viz. a 

 line across the snout, an oblique streak behind the eye, 

 widening towards the mouth, a pair of dots on the parietal 

 shields near the median suture, and a small spot on each of 

 the five anterior labials ; ventrals whitish, with black cross- 

 bars, mostly interrupted and alternating, prolonged from the 

 bars on the sides ; subcaudals black, each with a whitish 

 spot. 



Total length 350 millim. ; tail 87. 



The specimen is a female. 



