1 84 CICWLIVM. 



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

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

 on lower part of anterior arch. Dorsal XVI 10-11 ; spines subequal 

 from middle ones, or last longest, f to \ length of head ; longest soft 

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

 cycloid, 32-36 y^y 6 ; lateral lines 12 _ 1 ^ . Pale greyish olive, with 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 a 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. 



7. Ad. 





T) 



8-12. Ad. 





>1 



13. Skel. 





?) 



14-23. Yg. 





L. Nyassa, between Kondowe 

 and Karonga. 



24-30. Yg. 





L. Nyassa and Upper Shire. 



31-32. Ad. 



& hgr. 



Upper Shire. 



Sir J. Kirk (C). 



Prof. J. E.S.Moore (C). 



Capt. E. L. Tthoades (P.). 



A. Whyte, Esq. (0.) ; Sir 

 H. H. Johnston (P.). 



5) >1 



Dr. P. Kendall (C.) : 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. 467 (1901) ; Pellegr. Mem. Soc. Zool. France, xiv. 1904, p. 332. 



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

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

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

 small, f to •§ width 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. 



