156 THE TANGANYIKA PROBLEM. 



8. Barbus platyrhinus. — Blgr. 1900. (Fig., p. 157.) 



Depth of body 3^ 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^ 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 if as long as deep. Scales 40 -> 2 2 ^ between 



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, ca/cusis, 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, ih to if times as long as the diameter of 

 the eye, which is contained 5 to $k 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 £ 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 — j 3 between the lateral line and the root of the ventral. Olive 



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. 



