J 5 6 
THE TANGANYIKA PROBLEM. 
8. Barbus platyrhinus. — Blgr. 1900. (Fig., p. 157.) 
Depth of body 3J times in total length, length of head 4 times. Snout broad 
and rounded, twice as long as the diameter of the eye, which is contained 5.I times 
in the length of the head and 2 \ times in the interocular width ; mouth small, with 
two pairs of subequal barbels, the length of which equals the diameter of the eye. 
Dorsal III. 8 ; third ray not enlarged, not serrated ; the fin, which is equally distant 
from the eye and from the caudal, has the free edge convex. Anal III. 5 ; the 
longest ray not quite § the length of the head. Pectoral a little shorter than the 
head, not reaching the ventral, which is inserted below the middle of the dorsal. 
Caudal forked. Caudal peduncle 1$ as long as deep. Scales 40 — — — - 3^ between 
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the lateral line and the root of the ventral. Olive-brown above the lateral line, 
golden yellow beneath. 
Total length, 390 millim. 
Described from a single specimen from south of Usambura. 
This species appears to be more nearly related to B. capensis , Smith, from which 
it differs in the much shorter and broader snout. 
9. Barbus altianalis. — Blgr. 1900. (Fig., p. 159.) 
Depth of body equal to or slightly greater than the length of the head, which is 
contained 4 to 4$ times in the total length. Snout moderately broad, rounded, 
scarcely projecting beyond the lower jaw, ii to l§ times as long as the diameter of 
the eye, which is contained 5 to 5.4 times in the length of the head and twice to 
twice and one-fourth in the interocular width ; mouth small, with two pairs of 
subequal barbels, the length of which equals or exceeds a little the diameter of the 
eye. Dorsal III. -IV. 9; third or fourth ray very strong, ossified, not serrated; 
the fin, which is equally distant from the occiput and from the caudal, has the free 
edge notched, and its greatest depth is but slightly less than the length of the head. 
Anal III. 5; the longest ray measures about J the length of the head; the fin, 
when folded, reaches nearly the root of the caudal. Pectoral a little shorter than 
the head, not reaching the ventral, the first ray of which corresponds to the origin 
of the dorsal. Caudal forked. Caudal peduncle nearly twice as long as deep. 
Scales 34 35 — 3 between the lateral line and the root of the ventral. Olive 
Si- 
brown, very dark above. 
Total length, 450 millim. 
Described from two specimens from Lake Kivu and one from the source of the 
Rusisi River. 
B. altianalis is extremely closely related to B. mariquensis. Smith. It differs 
only in the somewhat broader snout, the stronger third dorsal ray, and the somewhat 
longer caudal peduncle. 
