>4 THE TANGANYIKA PROBLEM. 



peduncle twice as long as deep. Scales very finely denticulate on the edge, 39-40 

 2 — 3 27 — 31 



— - — - ; lat. 1, . Brown, lighter beneath; dorsal and anal with or without 



11 11 — 13 ° 



brown longitudinal streaks ; caudal spotted with black or brown at the base. 

 Total length, 87 millim. 

 Described from two specimens from Kinyamkolo and two from Mbity Rocks. 



49. Paratilapia nigripinnis. — Blgr. 1901. (Fig., p. 195, lower.) 



Depth of body 4 times in total length, length of head 3 to 3} times. Snout with 

 straight upper profile, as long as diameter of eye, which equals interocular width, 

 and is contained 3^ times in length of head ; mouth extremely protractile ; 

 maxillary extending to below anterior border of eye ; teeth very small, in three 

 rows ; two or three series of scales on the cheek ; opercle covered with scales. 

 Gill-rakers long and thin, closely set, 20 on lower part of anterior arch. Dorsal 

 XV. -XVII., 11 ; spines increasing in length to the last, which measures ? length of 

 head ; soft rays longer. Pectoral pointed, as long as head. Ventral reaching 

 origin of anal or beyond. Anal III., 8-9; third spine as long as the last dorsal. 

 Caudal deeply emarginate, the lobes produced into filaments. Caudal peduncle 



3 29 — ^o 



twice as long as deep. Scales with denticulate border, 39-40 — ; lat. 1 — — — 



11 13—16' 



Dark brown, lighter beneath ; fins blackish, the caudal edged with white above and 

 beneath. 



Total length 80 millim. 



Described from several specimens from Msambu. 



This species is very closely allied to P. leptosoma, but is distinguished by the 

 number of rays in the dorsal and anal fin (D. XV. -XVII. 11, A. III. 8-9, instead of 

 D. XII.-XIV. 14-16, A. III. 10-12). 



50. Bathybates ferox. — Blgr. 1898. (Fig. facing p. 184.) 



Teeth long, sharp, fang-like, wide apart, in four series in the upper jaw, in three 

 in the lower. Depth of body 4 times in total length, length of head 3 times. 

 Snout long and strongly compressed, with convex upper profile ; eye large, its 

 diameter If times in length of snout, 3^ in length of head, and a little greater than 

 interorbital width; maxillary not quite reaching to below anterior border of eye; 

 five series of small scales on the cheek ; large scales on the opercle. Gill-rakers 

 moderately long and slender, 13 on lower part of anterior arch. Dorsal XIV. 16 ; 

 spines rather feeble, slender, subequal from the fifth, which measures f length of 

 head ; longest soft rays i length of head. Pectoral f length of head. Ventral not 

 reaching vent. Anal III., 16; spines short and feeble. Caudal deeply forked, 

 middle rays not half as long as outer. Caudal peduncle nearly twice as long as 



deep. Scales small and irregular, especially below the lateral lines, 78 —' 



3^ 

 78 

 lat. 1 , the upper extending from the opercle to the caudal, the lower from below 



44 



the last dorsal spines to the caudal. Pale bluish green, iridescent above, white 



