1 84 ClClILEE-i:. 



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 anteiior arch. Dorsal XYI 10-11 ; spines subequal 

 from middle ones, or last longest, f ^o ^ length of head ; longest soft 

 rays -2- to f length of head. Anal III 8-9 ; third spine :j- to f length of 

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

 of anal or a little beyond. Ventral re.iching 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 -j^:^ ; lateral lines joff^. 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. Sir J. Kirk (C). 



7. Ad. „ Prof. J. E. S. Moore (C). 



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



13. Skel. 



" >) 



14-23. Yg. L. Nyassa, between Kondowe A. Whyte, Esq. (D.) ; Sir 



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



24:-30. Yg. L. Nyassa and Upper Shire. „ „ 



31-32. Ad. & hgr. Ujiper Shire. Dr. P. llendall ((!.) ; Sir 



H. H. Johnston (P.). 



2i. TILAPIA DOLLOI. 

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

 Congo, p. 407 (1901); Pellegr. Mem. Soc. Zool. France, xiv. 1901, p. 332. 



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

 times. Head If 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 bead ; eye 3 (young) to 4| times in length of head, 1 (young) to 

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

 small, I to f 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 tlie cheek, width of scaly part less than diameter of eye. 



