270 



CICIILID.T^. 



darker at the base; a black opercular spot; spinous dorsal and anal 

 with numerous dark horizontal streaks; soft dorsal and caudal with 

 round light spots on a dark ground; soft dorsal edged with bright 

 yellow. 



Total length 420 millim. 



Lakes Albert and Tanganjnka. 



Fig. 183. 



Fetrochromis andersonii. 

 Type (F. N.). f. 



Doubtfully distinct from the preceding. — The occurrence in L. Albert 

 needs confirmation. 



1. Type. L.Albert. Prof. J. E. S. Moore (0.). 



2. Ad. Kilewa Bay, L. Tanganyika. Dr. L. fStappers (C). 



3. PETROCHROMIS POLYODON. 



Boulcng. Tr. Zool. Soc. xv. 1898, p. 20, pi. vi. fig. 1, and Poiss. Bass. Congo, 

 p. 479 (1901) ; Pellegr. M6m. Soc. Zool. France, xvi. 1904, p. 352 ; 

 Bonleng. Tr. Zool. Soc. xvii. 1906, p. 573. 



Depth of body 2\ to 3 times in total length, length of head 2f to 

 3 times. Head twice or a little less than twice as long as broad ; snout 

 broader than long, 1^ to 2 times as long as eye, which is 4 to 5 times 

 in length of head and IJ to 2 times in intcrorbital width; mouth 



