220 CICilLID.E. 



of head, as long as eye, which is 3^ times in length of head, and a little 

 exceeds interorbital width or least depth of prseorbital ; mouth moderate, 

 about f width of head, extending to below anterior border of eye or a 

 little beyond ; end of maxillary exposed ; lips rather thick ; 3 series of 

 tricuspid teeth and an outer series of rather large bicuspid teeth, 40 to 

 42 in upper jaw; 3 or 4 series of scales on the cheek, width of scaly 

 part equal to diameter of eye. Gill-rakers short, 8 on lower jiart of 

 anterior arch. Dorsal XV 9-10 ; spines increasing in length to the 

 last, which measures nearly J length of head ; longest soft rays f length 

 of head. Anal 111 8-9 ; third spine shorter than last dorsal. Pectoral 

 barely f length of head, not extending to vertical of origin of anal. 

 Ventral reaching origin of anal or a little beyond. Caudal rounded. 

 Caudal peduncle as long as deep. Scales rather strongly denticulate, 

 29-31 ^fi ; lateral lines f^. Dark olive-brown, with ill-defined black 

 cross-bars ; a black vertical bar below the anterior half of the eye, and 

 a black opercular spot ; fins grey ; male with two to four round yellow 

 dark-edged spots on the anal. 



Total length 95 millim. 



Kuzi River, Portuguese East Africa. 

 1-3. Types. Idunda R, flowing into Lower C. M. F. Swynnerton, Esq. 



Buzi R. (P.)- 



54. TILAPIA ADOLPHI-FREDERICI. 



Bouleiig. in Schubotz, Wiss. Ergebn. Deutsch. Z.-Ai'r. Exped., Zool. iii. p. 25i, 

 pi. vi. (1914). 



Depth of body equal to length of head, 2i times in total length. 

 Head 2| times as long as broad ; snout >vith slightly convex upper 

 profile, as long as broad, much shorter than postocular part of head, as 

 long as eye, which is 3^ times in length of head, equals interorbital 

 width, and exceeds least depth of prseorbital ; mouth moderate, f width 

 of head, extending to below anterior border of eye ; teeth in 4 series, 

 outer moderately large, 42 in upper jaw ; 3 series of scales on the 

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

 7 on lower part of anterior arch. Dorsal XIV 10 ; spines increasing in 

 length to the last, which measures nearly ^ length of head ; longest 

 soft rays | length of head. Anal 111 9 ; third spine as long as last 

 dorsal. Pectoral as long as head, reaching beyond vertical of origin of 

 anal. Ventral somewhat produced, ■ extending a little beyond origin 

 of anal. Caudal truncate. Caudal peduncle as long as deep. Scales 



