OF FISHES FEOM LAKES TANGANYIKA AND KIVU. 153 



28. Bathtbates ferox Blgr. 



Several specimens from the South and West Coasts, from Kalambo, and from 

 Usambura. 1 have also examined specimens from Moliro and Albertville. The 

 species is thus seen to be widely dispersed in the lake, and not confined to great 

 depths. 



29. Bathtbates fasciatus. (Plate XVII. fig. 2.) 



Bouleng. Ann. & Mag. N. H. (7) vii. 1901, p. 3. 



Depth of body 4^ times in total length, length of head 3^ times. Shape of head 

 similar to that of the preceding species, but eye smaller, its diameter about twice in 

 length of snout, 5 times in length of head, and 1|- in interocular width ; 8 series of 

 small scales on the cheek ; larger scales on the opercle. 18 gill-rakers on lower part 

 of anterior arch. Dorsal XVII 16 ; spines subequal from the fifth, which measures j 

 length of head ; longest soft rays -J length of head. Pectoral pointed, f length of 

 head. Ventral not half as long as the distance between its base and the vent. Anal 

 III 18 ; spines very weak. Caudal forked. Caudal peduncle twice and a half as long 

 as deep. Scales very small, 140 in a longitudinal series above the upper lateral line, 



11 75 



25 in a transverse series ; lat. 1. jt,. Brownish above, white beneath ; a series of large, 

 rounded, blackish spots on each side of the back above the lateral line, alternating with 

 a series of vertical blackish bars on each side of the body ; on the tail, from the middle 

 of the soft dorsal, the spots unite into a band which extends to the caudal, and the 

 vertical bars likewise fuse to form a lateral band ; a blackish spot on the opercle, 

 another at the base of the ventral ; two black bands on the dorsal, a basal and a 

 marginal. 



Total length 340 millim. 



A single specimen from the West Coast, at Tembwi. 



This second species of the remarkable genus Bathybates differs from its congener in 

 the smaller eye, the more numerous gill-rakers, and the smaller scales. 



30. Pelmatochkomis polylepis. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 143, pi. Hi. fig. 1 (1900). 



Depth of body 2^ to 2f times in total length, length of head 3 to 3|- times. Snout 

 with straight upper profile, 1^ times diameter of eye, very deep, its length not 

 exceeding the width of the prseorbital region ; diameter of eye ?>^ to 3| times in length 

 of head, equal to or a little greater than interocular width ; maxillary extending nearly 

 to below anterior border of eye ; teeth very small, in 4 or 5 irregular rows in both 

 jaws, the outer somewhat larger ; 4 or 5 series of scales on the cheek ; larger scales on 

 the opercle. Gill-rakers short, lamellar, denticulate, 14 or 15 on lower part of anterior 

 arch. Dorsal XV-XVI 14-15 ; spines subequal from the sixth, which measures f or 



VOL. XVI. — PART III. No. 3. — October, 1901. 2 a 



