LAMPROLOGUS. 



4G3 



2. LAMPROLOGUS TETRACANTHUS. 

 Boiileng. Ann. Miis. Congo, Zool. i. p. 118, })1. xliv. fig. 5 (1899), and Poiss. Bass. 

 Congo, p. 398 (1901); Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 288. 



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

 Snout with slightly convex upper profile, a little longer than eye, which 

 is 3f times in length of head and a little exceeds intei orbital widtli ; 

 mouth extending to between nostril and eye ; head naked ; pits of 

 sensory canals very large. Gill-rakers short, 10 on lower part of 

 anterior arch. Dorsal XX 10 ; spines increasing in length to the last, 

 which measures f length of head and f longest soft rays. Anal IV 7. 

 Pectoral f length of head. Ventral produced into a filament, extending 

 a little beyond origin of anal. Caudal rounded. Caudal peduncle a 



Fig. 315. 



Lc.mprologus tetracanthus. 

 Type (A. M. C). 



little longer than deep. Scales 41 j^, very small on nape and bcHy ; 



30 



lateral lines y^. Dark brown ; a black opercular spot ; fins blackish, 

 dorsal edged with white ; light spots on the caudal. 



Total length 120 millim. 



Lake Tanganyika. — Type in Congo Museum, Tervueren. 



3. LAMPROLOGUS MARGINATUS. 

 Bouleng. Rev. Zool. Afr. iii. 1914, p. 443. 



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

 Snout with slightly convex upper profile, a little longer than eye, which 

 is 3J to of times in length of head and measures 1^ to H times inter- 

 orbital width ; mouth extending lo below anterior border of eye ; sides 

 of head nake.l, except a few scales on gill-cover ; pits of sensory canals 

 very large. Gill-rakers short, to 8 on lower part of anterior arch. 

 Dorsal XX 11 ; spines increasing in length to the last, which measures 



