TILAPIA. 



231 



as long as deep. Scales rather strongly denticulate, very small on 

 pectoral region, 32-33 --^ ; lateral lines jj^j. Brown above, whitish 

 beneath ; a more or less distinct vertical dark bar below anterior third 

 of eye ; dorsal, caudal, and pectoral tins brown, anal brownish or yellow, 



Fie. 151. 



Tilapia humilior. 

 Type (Ann. Mns. Genova, 1911). 



with or without two or three ocellar spots ; ventrals black in the male, 

 yellow in the female. 



Total length 110 millim. 



Victoria Nile. — Types in Genoa Museum. 



1-2. Types. Kakindu. Dr. E. Bayou (C.) ; Genoa 



Museum (P.). 



65. TILAPIA PALLIDA. 



Bouleng. Ann. Mns. Genova, (3) v. 1911, p. 72, pi. ii. fig. 1. 



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

 3 times. Head 2 to 2^ times as long as broad, upper profile descending 

 in an even, strong curve ; snout rounded, as long as broad or a little 

 broader than long, as long as or a little longer than eye, which is 3 (young) 

 to 3| times in length of head, equals interorbital width, and exceeds 

 least depth of praeorbital ; jaws equal in front ; maxillary not extending 

 quite to below anterior border of eye ; teeth small, in 3 or 4 rows, outer 

 largest, with oblique bicuspid crowns, 30 to 50 in upper jaw, inner 

 conical or indistinctly tricuspid ; 3 or 4 series of scales on the cheek, the 



