254 COLUBRID. 
1. Polemon barthii. 
Polemon barthii, Jan, Rev. § Mag. Zool. (2) x. 1858, p. 520, and 
xi. 1859, pl. v; Peters, Mon. Berl. Ac. 1868, p. 868, pl. —. fig. 7 ; 
Jan, Icon. Gén. 15, pl. i. fig. 3 (1866). 
Rostral twice as broad as deep, just visible from above; inter- 
nasals a little longer than broad, shorter than the prefrontals ; 
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 preocular, in contact with or narrowly separated from the 
posterior nasal; one postocular; temporals 141; 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. 
Olive-grey above, the scales edged with black; back of head and 
lower parts yellowish white. 
Total length 810 millim. ; tail 40. 
Guinea. 
a. 9 (V. 221; C. 18). Ashantee. Mr. McCarthy [C.]. 
199. BRACHYOPHIS. 
Brachyophis, Mocquard, Mém, Cent. Soc. Philom. 1888, p. 125. 
Maxillary 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 
pupil ; 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, Mocg. 1. c. pl. 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 internasals, 
which are shorter than the prefrontals ; frontal hexagonal, longer 
than broad, longer than 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 preocular and two 
small postoculars ; seven upper Jabials, second and third in contact 
with the prefrontal, 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 
