OF FISHES FEOM LAKE TANGANYIKA. 557 



31. Lajiprologus cunningtoni, sp. n. (Plate XXXVI, fig. 2.) 



Depth of body 3-| to 4:|- times in total length, length of head 3^ times. Snout 

 obtusely pointed, twice as long as eye, the diameter of which is contained 5 times in 

 length of head, and once and j in intevorbital width ; maxillary not extending quite 

 to below anterior border of eye ; 6 large canines in front of upper jaw, 4 in front of 

 lower, followed by a rather broad band of minute, villiform teeth ; lateral teeth 

 small ; cheek naked, its depth once and 1 diameter of eye ; operculum with a few 

 scales. Gill-rakers short, 8 on lower part of anterior arch. Dorsal XX 10-11, spines 

 increasing in length to the last, which measures about ^ length of head ; soft dorsal 

 acutely pointed behind, longest ray measuring -| length of head. Anal V 7, last spine 

 longest, as long as last dorsal ray; the fin pointed like the dorsal. Pectoral rounded, 

 -§■ length of head. Ventral reaching vent or a little beyond. Caudal rounded. 

 Caudal peduncle once and -g- as long as deep. Scales 85-87 ^^^-^ ; lateral lines i^f^' 



Greyish brown above, white beneath ; small light spots on the sides ; very indistinct 

 traces of five or six dark bars across the back ; vertical fins brown, with rather indis- 

 tinct small roundish light spots. Young with 7 or 8 regular dark bars on the body. 



Total length 190 millim. 



Two adult specimens from Moliro, native name Msheshe ; and two young from 

 Mbete, native name Twinanzoli. 



This species is allied to L. elongatus, but easily distinguished by the rounded caudal 

 fin, the shorter and fewer gill-rakers (8 instead of 12), and the more numerous spines 

 in the dorsal fin (20 instead of 17 or 18). 



32. Lampeologus trbtocephalus Blgr. 



A single specimen from Kigoma. Native name : Ndubu. Total length 53 millim. 

 D. XVII 10 ; A. V 6 ; Sc. 42 ^ ; L- 1- f^- Snout not longer than eye ; canine teeth 

 very small ; ventral fin reaching beyond origin of anal. 



33. Lampeologus mondabu, sp. n. (Plate XXXVI. fig. 3.) 



Depth of body 3| times in total length, length of head 3 times. Snout pointed, 

 once and f to twice as long as eye, the diameter of which is contained 4^ to 5 times in 

 length of head and equals or is slightly less than interorbital width ; maxillary extending 

 to halfway between verticals of nostril and eye ; 6 large canines in front of each jaw, 

 followed by a rather broad band of minute, villiform teeth; lateral teeth small; 

 cheek naked, its depth once and ^ diameter of eye ; operculum with a few scales. 

 Gill-rakers very short, 7 or 8 on lower part of anterior arch. Dorsal XIX 9 ; spines 

 increasing in length to the last, which measures f length of head ; soft dorsal acutely 

 pointed behind, longest ray measuring f length of head. Anal V 7, last spine longest, 

 i length of head ; the fin pointed like the dorsal. Pectoral rounded, | length of head. 



