1. HELMINTHOPHIS, 5 
It. yo gaa separated, the rostral forming a suture with the 
ntal. 
Eye under the ocular, which is separated 
from the labials by a subocular; two 
superposed preoculars ............ 3. petersii, p. 6. 
Eye under the ocular, which is in contact 
with the third upper labial; a single 
MINE, 4 oie ics cess ocels Ha'ihe 4. guentheri, p. 6. 
Eye under the suture between the pre- 
frontal and the ocular, which is sepa- 
rated from the labials by a subocular.. 5. albirostris, p. 6. 
1, Helminthophis flavoterminatus. 
phlops flavoterminatus, Peters, Mon. Berl. Ac. 1857, p. 402, and 
Arch. f. Nat. 1862, p. 43; Giinth. Tr. R. Soc. Mauritius, iv. 1870, 
pp- 63, 139, 
Tdio mops flavoterminatus, Jan, Ul. cc. Icon, 1. 1, pls. v. & vi. . 
Helminthophis flavoterminatus, Peters, Sitzb. Ges. naturf. Fr. 1881, 
P 
Rostral not half the width of the head, not extending to the level 
of the eyes, separated from the frontal by the prafrontals, which 
form a suture with each other; frontal broad ; two superposed pre- 
oculars and a subocular; eye distinguishable under the ocular; 
four upper labials, first largest, third in contact with the ocular. 
Diameter of body 50 to 60 times in the total length; tail as long 
as broad or a little longer than broad, rounded, 24 scales round 
the body. Brown, each scale darker in the centre; head and tail 
yellow. 
Total length 300 millim. 
Venezuela. 
a-c, Ad, & hgr. Venezuela. Dr. Seeman [P.]. 
d-e. a s+ — Dr. Ernst [P.]. 
Aghi i Rio Juan. 
z. Ad. . Mauritius (imported). L. Bouton, Esq. [P.]. 
2. Helminthophis frontalis. 
me Seay set frontalis, Peters, Mon, Berl. Ac. 1860, 
51 
aie his rentals, Bocourt, Miss. Sc. Mex., Rept. p. 502, 
pl. xxx. bg. 2 (1882). 
Rostral not half the width of the head, not extending to the level 
of the eyes, separated from the frontal by the prefrontals, which 
form a suture with each other; frontal broad; a single prwocular 
and two suboculars ; eye distinguishable under the ocular, which is 
very small; four upper labials, first largest. Diameter of body 
