184 ClCITLir.E. 



outer series of upper jaw ; 2 series of scales on the cheek, widtli of 

 scaly part less than diameter of eye. Gill-rakers moderate, 17 to 21 

 on lower part of anterior arch. Uorsal XYI 10-11 ; spines snbequal 

 from middle ones, or last longest, y to ^ length of head ; longest soft 

 rays ^ to f length of head. Anal III 8-9 ; third spine ^ to f length of 

 head. Pectoral as long as or slightly longer than head, reaching origin 

 of anal or a little beyond. Ventral reaching vent or not so far. 

 Caudal densely scaled, rounded with a feeble median notch, or upper 

 angle pointed. Caudal peduncle a little longer than deep. Scales 



3- . 20— ''■^ 



cycloid, 32-36 -^^g ; lateral lines y^^- -^^^® greyish olive, \a ith or 

 without 8 more or less regular blackish cross-bars, or dark brown to 

 bluish-black ; soft dorsal with oblique dark streaks, or fins bluish-black 

 with u yellow or orange edge ; the blackish cross-bars constant in the 

 young, which bear a large black spot on the anterior part of the soft 

 dorsal. 



Total length 300 millim. 



Lake Nyassa and Upper Shire River. 



1-6. Skins, types. L. Nyassa. Sir J. Kirk (C). 



7. Ad. „ Prof. J. E. S. Moore (C). 



8-12. Ad. „ Capt. E. L. Hhoades (P.). 



1.'}. Skel. „ „ 



11-23. Yg. L. Nyassa, between Kondowe A. Whyte, Esq. (0.) ; Sir 



and Karonga. H. H. Johnston (P.). 



21-30. Yg. L. Nyassa and Upper Shire. „ „ 



31-32. Ad. &hgr. Upper Shire. Dr. P. Rendall ((!.) : Sir 



H. H. Johnston (P.). 



24. TILAPIA DOLLOI. 



Bouleng. Ann. Mns. Congo, Zool. i. p. 123, pi. xlv. fig. 5 (1899), and Poiss. Bass. 

 Congo, p. 4G7 (1901) ; Pcllegr. Mem. Soc. Zool. France, xiv. 1904, p. 332. 



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

 times. Head 1| to 2 times as long as broad ; snout with straight or 

 slightly convex upper profile, a little broader than long, | to f postocular 

 part of head ; eye 3 (young) to 4J times in length of head, 1 (young) to 

 ]| times in interorbital width, equal to praeorbital depth; mouth rather 

 small, I to f widtli of head, extending a little beyond vertical of nostril ; 

 teeth very small, extremely slender at the base, very movable, in 3 to 5 

 series, 40 (young) to 80 in outer series of upper jaw ; 2 (rarely 3) series 

 of scales on the cheek, width of scaly part less than diameter of eye. 



