230 cichlid^:. 



of head and exceeds interorbital width ; lower jaw projecting ; mouth 

 extending a little beyond anterior border of eye; teeth in 3 or 4 rows, 

 outer bicuspid, others tricuspid ; 36 to 40 teeth in outer row of upper 

 jaw ; 3 or 4 series of scales on the cheek, width of scaly part § diameter 

 of eye. Gill-rakers moderately long, 9 on lower part of anterior arch. 

 Dorsal XV-XVI 9 ; spines subequal from the sixth or seventh, -§■ or a 

 little less than \ length of head. Anal III 8 ; third spine as long as 

 and stronger than longest dorsals. Pectoral as long as or a little shorter 

 than head, reaching, or nearly reaching, vertical of origin of anal. 

 Ventral extending beyond vent. Caudal truncate. Caudal peduncle 

 1-j to If times as long as deep. Scales strongly denticulate, 32- 

 33 jg ! lateral lines gj 13 . Olive above, orange beneath, with two black 

 lateral bands, the upper above the upper lateral line and extending to 

 the end of the dorsal, the lower from the opercular spot to the root 

 of the caudal fin ; fins uniform yellowish, ventrals sometimes blackish. 

 The specimen in the British Museum uniform brownish above and white 

 below. 



Total length 74 millim. 



Lake Victoria. — Types in Paris Museum. 



1. Hgr. Kisumu Bay, Kavirondo. A. Blayney Percival, Esq. (P.). 



64. TILAPIA HUMILIOR. 

 Bouleng. Ann. Mus. Genova, (3) v. 1911, p. 74, pi. iii. fig. 3. 



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

 3J times. Head 2-J to 2\ times as long as broad, upper profile forming 

 an even curve ; snout rounded, as long as broad, as long as eye, which is 

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

 least depth of preeorbital ; jaws equal in front ; mouth extending to 

 below anterior border of eye; teeth small, slender, closely set, in 4 or 5 

 rows; 44 to 54 teeth in outer row of upper jaw ; 3 series of scales on the 

 cheek, width of scaly part less than diameter of eye. Gill-rakers short, 

 7 or 8 on lower part of anterior arch. Dorsal XV-XVI 9-10; spines 

 increasing in length to the last, which measures \ length of head ; 

 longest soft rays f to § length of head. Anal III 8-10 ; third spine as 

 long as or a little shorter than last dorsal. Pectoral shorter than head, 

 not reaching vertical of origin of anal. Ventral not reaching origin of 

 anal. Caudal rounded-subtruncate. Caudal peduncle 1^- to If times 



