2G8 



CICHLID.E. 



II. 4-G series of scales on the cheek ; 10-16 gill-rakers on lower part of 

 anterior arch. 

 D. XVII-XIX 8-10; A. Ill 7-8; Sc. 32- 



34 jj^y; 10-13 gill-rakers; snout l|-2 



times as long as eye 3. P. poli/odon, Blgr., p. 270. 



D. XIX 8 ; A. Ill 7 ; Sc. 35 \^ ; 13 gill-rakers ; 



snout 1^ times as long as eye 4. P. wz/asso;, Blgr., p. 272. 



D. XVIII-XX 8-9 ; A. Ill 7-8 ; Sc. 32- 



34 TTZTn ; 12-16 gill-rakers ; snout not or 



but slightly longer than eye 5. P. /aAr/o/af ms, Blgr., p. 273. 



Yisc. 182. 



Petrochromis tanyanicce. 



1. PETROCHROMIS TANGANIO^. 



Clirom'wi fanganiac, Giinth. Proc. Zool. Soc. 1893, p. 630, fig. 



Tilajtia taiujaidca; Boulong. Tr. Zool. Soc. xv. 1898, p. 5, and Proc. Zool. Soc. 



1899, p. 113. 

 retroclivoiiHs taiujankd', Bouleng. Poiss. Bass. Congo, p. 480 (1901) ; Pellegr. 



Mem. Soc. Zool. France, xvi. 1904, p. 351. 



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

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

 snout 1^ to 1^- times as long as eye, which is 3^ to 4^ times in length 

 of head and 1| to 2 times in interorbital width; mouth extending to 

 below nostril or a little beyond ; 3 series of scales on the cheek, depth 



