268 



CICHLID,?:. 



11. 4-6 series oE scale, on the che.k ; 10-16 giU-rakers on lower part of 

 anterior arch. 

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

 34.-^; 10-13 gill-rakers; snout 1^-2 



times as long as eye a. jr. I J 



D. XIX 8 ; A. Ill 7 ; Sc. 35 'f ; 13 gill-rakers ; 



snout H times as long as eye 4. P. ny«..«% Blgr., p. 272. 



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

 34 |t*^ ; 12-16 gill-rakers ; snout not or 

 but slightly longer than eye .5. P. /a.«oZah,., Elgr., p. 273. 



rig. 182. 



Petrochromis tanganicce. 



1. PETROCHROMIS TANGANIO^. 



Chromis tangan'iccc, Giinth. Proc. Zool. Soc. 1893, p. 630, fig. 



Tilajtia tanganicir, Bouleng. Tr. Zool. Soc. xv. 1898, p. 5, and Proc. Zool. Soc. 



1899, p. 113. 

 Petrochromis tanoanicce, Bouleng. Poiss. Bass. Oongo, 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 IJ times as long as eye, which is SJ to 4J times in length 

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

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



