29. oPHIOGNoMON, 421 
by a rather narrow yellow band, which commences on the supra- 
ciliary region; dorsal region between the latter yellowish grey, 
bounded exteriorly by a distinct blackish line, and divided medially 
by an indistinct blackish line; head brownish, paler below. 
millim. millim. 
Head ............ 8 From end of snout 
Width ofhead .... 0 4:5 to vent ........ 67 
From end of snout 
to forelimb .... 16 
Napo or Upper Marafion. 
2. Ophiognomon abendrothii. 
Chalcides (Hapalolepis) abendrothii, Peters, l. c. p. 399. 
Ophiognomon trisanale, O'Shaughn. Ann. § Mag. N.H. (4) xii. 1873, 
p. 4h. 
The following characters disagree with those assigned by Cope to 
O. trisanale :—The fore limb is not as long as the three anterior 
labials, and the hind limb is reduced to an extremely minute tubercle 
which can hardly be distinguished with the naked eye. Five upper 
labials ; second pair of chin-shields frequently forming a suture. 
Twenty-six to twenty-eight scales round the body; forty-nine to 
fifty-two transverse rows of scales from occiput to base of tail (forty 
to forty-two between axilla and groin). Males with two preanal 
pores on each side. Brown, sides darker; a light band, bordered on 
both sides by a dark line, along each side of the back, commencing 
from the supraciliary region; a median dark brown line. 
millim. millim. 
Total length.......... 146 From end of snout to fore 
Gad. so oss aks eweioe ag 65 TDS vcsniue aieeus aoaacene 12 
Width of head........ 45 From end of snout to vent 59 
North-eastern Peru. 
ad. Sarayacu, Peru. Berlin Museum [P.]. (One 
of the types.) 
b-e. SQ. Sarayacu, Peru. Messrs. Veitch [P.]. 
3. Ophiognomon vermiforme. 
Propus vermiformis, Cope, 1. c. 
Limbs one pair, the anterior only. Scales in twenty-six rows on 
the posterior and twenty rows on the anterior part (with closed 
lateral folds) of the body, and fifty-one transverse annuli between 
the nape and the vent; anteriorly they are imbricate on the dorsal 
surface, posteriorly they are truncate. Five upper labials; two 
pairs of chin-shields in contact. ‘wo femoral pores on each side. 
Colour, a dark reddish brown; a dorsolateral series of pale spots on 
each side, separated by an average width of eight scales. 
