29. opniOGNOJiON, 



421 



by a rathor 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. 



Napo or Upper Maranon. 



2. Opliiognomon abendrothii. 



Chalcides (Hapalolepis) abeudrothii, Peters, I. c. p. 399. 

 Ophiognomon trisauale, O'Shauc/hn. Ann. ^~ Mag. N. H. (4) xii. 1873, 

 p. 44. 



The following characters disagree with those assigned by Cope to 

 0. 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 freijuently forming a suture. 

 Twenty-six to twenty-eight scales round the body ; fortj'-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 prffianal 

 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 140 From end of snout to fore 



Head 0-5 limb 12 



Width of head 4-5 From end of snout to vent 59 



North-eastern Peru. 



a. J . Sarayacu, Peru. Berlin Museum [P.]. (Ouu 



of the types.) 

 b-e. (5 2 ■ Sarayacu, Peru. Messrs. Veitcli [P.]. 



3. Ophiognomon vermiforme. . 

 Propus vermiforniis, Cope, I. 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 napo and the vent ; anteriorly tiicy are imbricate on the dorsal 

 surface, posteriorly they are truncate. Five upper labials; two 

 pairs of chin-shields in contact. Two femoral pores on each side. 

 Colour, a dark reddish brown ; a dorsolateral series of palo spots on 

 each side, separated by an average width of eight scales. 



