OF riSHES FEOM LAKE TANGANYIKA. 559 



last, which measures half the length of the head, and the pectoral fin measures two- 

 thirds the length of the head. The anal spines number constantly 8 ; one specimen 

 has 6 soft anal rays, the others having 5. The adult specimen is of a uniform dark 

 brown ; the other specimens, according to the collector's notes, were grey-brown or 

 olive above, shading to white beneath, the scales of the upper parts dark-edged ; the 

 dark bars on the body less distinct than in the type specimen ; the dorsal fin is tipped 

 with black, the pectorals are olive and the ventrals black. 



37. Lampeologus hecqui Blgr. 



Two specimens from Niamkolo Bay, taken in an empty Neothauma shell, and three 

 from Mtondwe Bay. Total length 45-60 millim. Regarded by the native fishermen 

 as adult, and called by them Kitota, Nyonga, and Mpama. 



Depth of body o\ to 3| times in total length. Dorsal XVIII-XIX 8-9; anal 

 VI-VII 7-8. Scales 52-56 ^ ; lat. 1. f^. Gill-rakers rather long and slender, 



15-17 4-10 =3 ' 



12 to 15 on lower part of anterior arch. Grey above, lighter below, with 8 or 9 dark 

 vertical bars on each side, or large blotches alternating with narrow bars ; a more or 

 less distinct dark round spot at the root of the caudal fin ; vertical fins with dark bars ; 

 dorsal fin and upper part of caudal with a pale border faintly edged with black, as in 

 L. callipterus. 



38. Lampeologus callipteeus, sp. n. (Plate XXXVI. fig. 4.) 



Depth of body equal to length of head, 3^ to 3^ times in total length. Snout 

 obtusely pointed, once and \ as long as eye, the diameter of which is contained 

 4 times in length of head and hardly equals interorbital width ; maxillary extending 

 to below anterior border of eye ; 6 or 8 large canines in front of each jaw, followed by 

 a moderately broad band of minute, villiform teeth; lateral teeth small ; cheek entirely 

 naked or almost so ; operculum with large scales. Gill-rakers rather long, 10 to 12 

 on lower part of anterior arch. Dorsal XVIII-XIX 9, spines increasing in length to 

 the last, which measures nearly | length of head ; soft dorsal acutely pointed, longest 

 ray f to f length of head. Anal VIII 7-8, last spine nearly as long as last spine of 

 dorsal ; the fin pointed like the dorsal. Pectoral rounded, about f length of head. 

 Ventral extending to origin of anal, or beyond. Caudal rounded. Caudal peduncle 

 once and ^ to once and \ as long as deep. Scales 38-40 j^-jj; lateral lines jq^jI- 

 Brown or olive above, paler or whitish below, the scales edged with darker; dorsal 

 fin with a yellow border finely edged with blackish, this border continued on the upper 

 third of the caudal ; vertical fins with numerous small round whitish spots. 



Three specimens, measuring from 90 to 125 millim. The largest is from Mpala, the 

 two others from Niamkolo. Native name : Zagezi and Miseke or MoseJce. 



