256 



CICHLID.!'. 



rather deeply emarginate. Caudal peduncle 1| times as iorg as deep. 



4-5 



23-24 



Scales finely denticulate, 34-3-3 -j^; lateral lines jy^^ . Pale brown 

 above, silvery white beneatli ; five dark brown cross-bars, brcjken up 



Pig. 1 72. 



Tilajna rostrata. 

 Type (P. Z. S. 1899). 



into large spots ; a small dark brown opercular spot ; a large dark 

 brown spot at base of caudal ; fins white, dorsal sometimes with small 

 round dark spots. 



Total length 210 mlUini. 



I^ake Nyassa. 



1. Type. L. Nyassa. Miss M. Woodward (C.) ; 



Miss S. C. McLanglilin (P.). 



2. AJ. „ Prof. J. E. S. Moore (C). 



S6. TILAPIA DARDENNII. 



Bouleng. Tr. Zool. Soc. xv. 1899, p. 92, ]^\. xx. i\g. 1, Ann. Mus. Congo, Zool. i. 

 p. 150, pi. Iv. fig. 2 (1900), and Poiss. Bass. C^ongo, p. 472 (1901) ; Pellegr. 

 Mem. ISoc. Zool. France, xvi. 1904, p. 342; Bouleng. Tr. Zool. Soc. xvii. 

 1906, p. 572. 



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

 times. Head 2 to 2j times as long as broad, with strongly curved 

 uj)per profile ; snout rounded, as long as broad or a little broader than 

 long, as long as or a little longer than postocular part of head, 1 to 1^ 

 times as long as eye, which is 3j to 3^ times in length of head, equals 

 or nearly equals interorbital width and exceeds least prteorbital depth ; 

 mouth moderate, f to | width of head, extending to between nostril 

 and eye ; teeth small, in 4. or 5 series, 00 (young) to 68 in outer series 



