PETKOCHROMIS.— CUNNIXGTONIA. 273 



5. PETROCHROMIS FASCIOLATUS. 

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



Depth of body 2J to 3j times in total length, length of head 3 to 



3j 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 1^ times in interorbital 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; opines subequal from the 



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



J length of head. Anal III 7-8 ; third spine as long 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 jItj^ ; lateral lines joify. Dark brown, with numerous, more or 



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



browm. 



Total length 115 millim. 



Lake Tanganyika. — Types in Congo Museum, Tervueren. 

 1-2. Two of the types. Kapampa. Dr. L. Stap})ers (C). 



3. CUNNINGTONIA. 



Bouleng. Tr. Zool. Soc. xvii. 190G, ]). 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. Vertebrae 

 36 (18 + 18). 



Lake Tanganyika. 



Connected with Tilcqna through T. grdndoculis. 



1. CUNNINGTONIA LONGIVENTRALIS. 

 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 lepgth of head and equals 

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



VOL. III. T 



