“i 
514 VIPERID2. 
a-b. Hgr. (Sc. 25; V.220, 150 miles up the Niger. W. H. Crosse, Esq. 
287 ; C. 28, 26). P 
c. 2 (Sc. 27; V. 257; Wadelai. Dr. Emin Pasha(P.}. 
~ C. 98), 
d. ¥g. Xs. 25; V. 241; Uganda, Mr. Baxter [C.]. 
©. 22), 
4. Atractaspis corpulenta. 
Brachycranion vad energy Hallow. Proc. Ac. Philad. 1854, p. 99. 
Atractaspis corpulentus, Hallow. Proc. Ac. Philad. 1857, p. 70; 
Giinth. Cat. p. 239 (1858), and Ann. §& Mag. N. H. (4) ix. 1872, 
p- * pl. iii. fig. F; Mocg. Bull. Soc. Philom. (7) xi. 1887, 
p- 87. 
—— leucura, Mocg. Bull. Soc. Philom. (7) x. 1886, p. 14, pl. v. 
Snout strongly projecting, cuneiform. Rostral large, its upper 
portion as long as its distance from the frontal; suture between the 
internasals a little shorter than that between the prefrontals *; 
frontal as long as broad, much longer than its distance from the 
end of the snout, as long as the parietals; one pre- and one post- 
ocular ; temporals 143, anterior very large and wedged in between 
the fourth and fifth labials ; five upper labials, third and fourth 
entering the eye; first lower labial in contact with its fellow 
behind the symphysial; second lower labial very large, fused with 
the chin-shields and also forming a suture with its fellow. Scales 
in 23-27 rows. Ventrals 178-193; anal entire; subcaudals 23-27, 
all entire or only a few divided. Uniform blackish brown; tail 
sometimes white. 
Total length 345 millim. ; tail 33. 
West Africa (Liberia to Gaboon). 
a. & (Sc. 25; V.178; 0.25).  Gaboon. 
5. Atractaspis rostrata. 
es Fe eae Giinth. Ann, §& Mag. N. H. (4) i. 1868, p. 429, 
pl. xix. fig. I. be 
—— bibronii (non Smith), Peters, Reise n. Mossamb. iii. p. 142, 
pls. xix A. fig. 2 & xx. fig. 11 (1882), 
, we irregularis, Pfeffer, Jahrb. Hamb, Wiss. Anst. x. 1898, 
p. 19. 
Snout very prominent, cuneiform. Rostral with sharp horizontal 
edge, the portion visible from above nearly as long as its distance 
from the frontal; suture between the internasals a little longer or 
a little shorter than that between the preefrontals ; frontal a little 
longer than broad, longer than its distance from the end of the 
snout, as long as the parietals; one pra- and one postocular; a 
large temporal, wedged in between the fourth and fifth upper labials ; 
* The fusion of the internasals with the prefrontals, in the specimen 
described by Hallowell, is probably an individual anomaly. 
