16 i G. A. BOULENGER 
15. Atractaspis leucomelas, sp. n. (Plate IV, fig. 2). 
Snout very short. Portion of rostral seen from above nearly 
as long as its distance from the frontal; suture between the 
internasals half as long as that between the preefrontals; frontal 
large, once and two fifths as long as broad, much longer than 
its distance from the end of the snout, as long as the parietals; 
supraocular separating the przeocular from the frontal; one 
pree- and one postocular; temporals small, scale-like, 2+ 3; 
six upper labials, third and fourth entering the eye, fourth 
largest; three lower labials in contact with the chin-shields. 
Body very long and slender; scales in 23 rows; ventrals 243; 
anal entire; subcaudals 27, 14" to 17" divided, rest single. Black 
above, with a white vertebral line, occupying one and two half 
rows of scales; ventrals and subcaudals, and four outer series 
of scales on each side white; neck entirely black; head white, 
with a black blotch covering the nasals, internasals, preefrontals, 
frontal, supraoculars, and parietals. 
Total length 575 millim.; tail 40. 
A single female specimen from Ogaden. 
BATRACHIANS 
1. Rana delalandii, D. & B. 
A single specimen from between the wells of Laftarugh and 
Aberio. 
2. Rana mascareniensis, D. & B. 
Several specimens. Auata and between the wells of Laffa- 
rugh and Aberiò. 
3. Arthroleptis bottegi, sp. n. (Plate IV, fig. 3). 
Head moderate, a little longer than broad; snout rounded, 
a little shorter than the diameter of the orbit; canthus rostralis 
rounded ; tympanum distinct, three fifths the diameter of the 
