PETIIOCHBOMIS.— CUi\i^'IXGT()^ iA. 273 



.5. PETROCHROMIS FASCIOLATUS. 

 Bouleng. Rev. Zool. AEr. iii. 1914, p. 446. 



Depth of body 2| to 3^ times in total length, length of head 3 to 

 3| times. Head 1| to If times as long as broad ; snout much broader 

 than long, not or but little longer than eye, which is 3| to 3| times 

 in length of head and 1^ to fi times in intevorbital width ; mouth 

 extending to below nostril, or to between nostril and eye ; lips thick ; 

 3 or 4 series of scales on the cheek. 12-16 gill-rakers on lower part 

 of anterior arch. Dorsal XVIII-XX 8-9 ; spines subequal from the 

 seventh or eighth, about f length of head ; longest soft rays about 

 ^ length of head. Anal III 7-8 ; third spine as h)ng as longest 

 dorsals. Pectoral as long as head, not quite reaching vertical of origin 

 of anal. Ventral reaching vent or origin of anal. Caudal truncate. 

 Caudal peduncle a little longer than deep. Scales feebly denticulate, 

 32-34 ^^ ; lateral lines ^^. Dark brown, with numerous, more or 

 less distinct vertical blackish bars; a black opercular spot ; fins greyish 

 brown. 



Total length 115 millim. 



Lake Tanganyika. — Types in Congo Museum, Tervueren. 

 1-2. Two ot the types. Kapampa. Dr. L. (^tappers (C). 



3. CUNNINGTONIA. 



Bouleng. Tr. Zool. Soc. x\ii. 1906, p. 573. 



Body moderately elongate; scales ctenoid; two lateral lines, upper 

 nearly complete, lower incomplete. Jaws with broad bands of minute, 

 bristle-like teeth with incurved tricuspid crowns. Maxillary largely 

 exposed at the end. Dorsal with 13 spines, anal with 3. Vertebrse 

 36 (18+18). 



Lake Tanganyika. 



Connected with Tilcqna through T. grandoculis. 



]. CUNNmGTONIA LONGIVENTRALTS. 

 Bouleng. t. c. p. -574, pi. xli. fig. 2. 



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



Head twice as long as broad; snout much broader than long, very 



convex, shorter than eye, which is 2^ times in length of head and equals 



interorbital width ; mouth extending to below anterior border of eye ; 



VOL. in. '' 



