NAIA ANGUSTICEPS. 
broad ; occipital plates large, oblong, and broadest anteriorly, each in front 
two-sided, externally somewhat three-sided ; nasal plate quadrangular, the 
upper anterior angle slightly prolonged ; naso-frenal subtriangular ; frenal 
wanting, its place being supplied by the lower portion of the fronto-nasal ; 
preocular plates three, the uppermost the largest ; post-ocular plates three, 
the lowermost the largest ; temporal plates five, arranged in two ver- 
tical rows, the lowermost plate of each row many-sided, with a point 
descending between the labial scales. Plates of the upper lip, exclusive 
of rostral, eight, the third and sixth much the largest, the latter prolonged 
upwards between the lowermost post-ocular and inferior temporal plates ; 
plates of lower jaw, exclusive of the mental plate, nine ; submental plates 
two pairs, long and narrow. Scales of the neck close to the head 
small and somewhat six-sided, not arranged in any regular order behind 
those of the body, are long, narrow, subovate, or somewhat rhomboidal, and 
arranged in oblique rows ; all the scales of the back are doubly imbricate, 
the posterior extremity of each lying over the base of the one immediately 
behind it, and the inner edge of each lying over the outer edge of the one 
immediately inside of it. Each of the rows of scales on the body shew three 
angles, one on each side close to abdominal plates, obtuse and directed for- 
wards, the third at the middle of the back acute and pointing backwards. 
The scales of the tail are much shorter than those of the body, broad, rhom- 
boidal, and slightly imbricate. At the middle of the body there are 19 scales 
in each row, and at the base of the tail 9. Abdominal plates, 210. Subeaudal 
scales, 110. Length of specimen figured, from nose to anus, 4 feet 8 inches ; 
from anus to point of tail, 1 foot 4 1 inches. Length of brown specimen re- 
ferred to, from nose to anus, 6 feet 1 1 inches ; from anus to extremity of tail, 
1 foot 8i inches. Abdominal plates, 267 ; subeaudal scales, 115. 
This species occurs about Natal and in the country to the eastward, towards Delegoa 
Bay. It is better fitted for climbing trees than Naia Haje, and in various respects appears 
to be an aberrant species. 
