Mr. G. A. Boulengcr on Three new Snakes. 451 



lower parts black, uniform or with a median series of small 

 whitish spots on the anterior part of the body. 



Total length 570 mm. ; tail 110. 



Two specimens from Efulen, S. Cameroon; collected by 

 Mr. G. L. Bates. 



Atractus vertebrah's. 



Snout rounded. Rostral small, broader than deep, just 

 visible from above ; internasals very small ; prefrontals as 

 long as broad; frontal as long as broad, as long as the pre- 

 frontals, two thirds the length of the parietals ; loreal twice 

 and a half as long as deep ; two postoculars ; temporals 1 + 2 ; 

 seven or eight upper labials, third and fourth or fourth and 

 fifth entering the eye; four lower labials in contact with the 

 single pair of chin-shields, which are rather elongate, mode- 

 rately broad, and separated from the symphysial. Scales in 

 17 rows. Ventrals 173 ; anal entire; subcaudals 21. Brown 

 above, with small black spots and a black vertebral streak 

 edged with yellowish ; upper surface of head blackish ; upper 

 lip yellowish ; ventral shields yellow in the middle, black on 

 the sides, one or two shields here and there entirely black 

 and forming cross-bars on the belly. 



Total length 470 mm. ; tail 35. 



A single female specimen from Santo Domingo, Carabaya, 

 Peruvian Andes, altitude 6000 feet; collected by Mr. G. 

 Ockenden. 



Apistocalamus Pratti. 



Snout short, rounded. Rostral a little broader than deep, 

 the portion visible from above measuring one third its 

 distance from the frontal ; internasals half the length of the 

 prefrontals ; frontal slightly longer than broad, as long as 

 its distance from the end of the snout, much shorter than the 

 parietals ; nostril between two nasals *, the posterior forming 

 a suture with the single prgeocular, which is nearly twice as 

 long as deep ; a single postocular ; temporals 1 -f- 1 ; six 

 upper labials, third and fourth entering the eye ; three lower 

 labials in contact with the anterior chin-shields; posterior 

 chin-shields smaller, separated by a large scale. Scales in 

 15 rows. Ventrals 190; anal divided ; subcaudals 41, partly 

 single, partly paired. Olive- brown above; an oblique 

 yellowish streak on each side of the nape ; upper lip 



* The discovery of this species necessitates an alteration in the generic 

 diagnosis (Ann. & us - Geneva, 2, xviii. 1898, p. 705), as the first labial 

 and the internasal do not border the nostril. 



