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Helicops gomesi sp. n. 
(Plate 1; figs. 1-4) 
Number of specimens — 13. 
Type description — Adult 2. Maxillary teeth 18, increasing 
in size posteriorly. Small eyes. Rostral visible from above, broader 
than deep, m contact with the internasal. Semi-divided nasal with 
nostrils directed upwards. Frontal with median longitudinal salience; 
rounded posterior extremity; as wide in front as in back; about 
three times as loug as broad (6,25 : 2,25); longer than its distance 
from the end of the snout, as long as the parietals and twice 
and a half as long as the diameter of the eye (6,25 :2,5). Loreal 
deeper than long. Praeocular 1. Postoculars 2. Temporals 1 4-2, 
all smooth. Upper labials 8, the 4 th. in contact with the eye. 
Lower labials 10, 6 in contact with the chin-shields, only 4 in 
contact with the anterior chin-shields that are a little shorter 
than the posterior (5,5:7). Convex head plates, accentuated at 
the borders so that the sutures are very deep. Scales in 19 
rows, strongly keeled, except those of the posterior temporal and 
the contiguous occipitals which are smooth; keels very slight 
in the Ist. row (external). Ventrals 131, rounded. Anal divided. 
Subcaudals 67 pairs. 
Olive-brown or slightly greenish' above with a series of dark 
blotches of irregular form along either side, elongated transversally 
and narrower above. These are directly opposed to, or sometimes 
alternate with those of the other side and extend as tar up as 
the 6th., 7th. or 8 th. row of scales and down to the belly; 
towards the front to the nape, and towards the back to the 
end of the tail. Another series of smaller blotches of the same 
color, rhomboidal or irregular, beginning at the nape, covering 
the vertebral region and placed in correspondence to the intervals 
between the afore mentioned spots from which tley are generally 
separated by light-brown spaces, which run in crooked or zig-zag 
lines. A light yellow interrupted stripe formed by an aggregation 
of spots at the point where the dark spots of the back, above 
described, pass to the belly; mentals, lower labials and gulars 
yellow with black blotches or spots. Belly brownish yellow, greenish 
or olive color, with a series of black blotches, incomplete, placed 
on either side in continuity with those on the back. These are 
of variable form, much longer than broad and have in their 
intervals other small black and irregular blotches. 
