254 



COLTJBEIB^. 



1. Polemon barthii. 



Polemon barthii, Jan, Hev. 8f Mag. Zool. (2) x. 1858, p. 620, and 

 xi. 1859, pi. V ; Peters, Mon. Berl. Ac. 1863, p. 368, pi. — . fig. 7 ; 

 Jan, Icon. Gen. 16, pi. i. %. 3 (1866). 



Rostral twice as broad as deep, just visible from above ; inter- 

 nasals a little longer than broad, shorter than the prsefrontals ; 

 frontal small, a little longer than broad, hardly as long as its 

 distance from the rostral, about half as long as the parietals ; a 

 small prseocular, in contact with or narrowly separated from the 

 posterior nasal ; one postooular ; temporals 1 + 1 ; seven upper 

 labials, third and fourth entering the eye, fifth forming a short 

 suture with the parietal ; four lower labials in contact with the 

 anterior chin-shields, which are longer than the posterior. Scales 

 in 15 rows. Ventrals 221-226 ; anal entire ; subcaudals 16-18. 

 OUve-grey above, the scales edged with black ; back of head and 

 lower parts yellowish white. 



Total length 810 millim. ; tail 40. 



Guinea. 



a. ? (V. 221 ; C. 18). Ashantee. Mr. McCarthy [C.]. 



199. BEACHYOPHIS. 



Brachyophis, Moequard, M4m. Cent. Soc. Philom. 1888, p. 125. 



MaxiUary very short, with two or three small teeth followed, 

 after an interspace, by a large grooved fang; mandibular teeth 

 increasing in length to the third. Head small, not distinct from 

 neck, with depressed, sharp-edged snout ; eye minute, with round 

 pupU ; nostril in a single nasal, which does not touch the rostral, 

 the internasal forming a suture with the first labial ; no loreal ; no 

 temporals ; a large azygous occipital shield. Body remarkably 

 short, cylindrical ; scales smooth, without pits, in 15 rows ; ventrals 

 obtusely angulate laterally. Tail extremely short ; subcaudals 

 single. 



Somaliland. 



1. Brachyophis revoili. 



Brachyophis revoili, Mocq. I. c. pi. xi. fig. 3. 



Rostral large, the portion visible from above at least as long as 

 its distance from the frontal and wedged in between the intern asals, 

 which are shorter than the praefrontals ; frontal hexagonal, longer 

 than broad, longer tiian its distance from the end of the snout, 

 shorter than the parietals, between which the point of a large 

 pentagonal occipital is wedged in ; a small preeocular and two 

 smaU postoculars ; seven upper labials, second and third in contact 

 with the prsefrontal, third and fourth entering the eye, fifth and 

 sixth largest and in contact with the parietals ; two pairs of large 

 chin-shields, separated from each other on the median line by two 



