TIL APIA 



261 



89. TILAPIA MAOROPHTHALMA. 

 Bouleng. Ann. & Mag. N. H. (8) ii. 1908, p. 242, 



Depth of body nearly equal to length of head, 2f to 3 times in total 

 length. Head 2J to 2| times as long as broad ; snout rounded, with 

 very convex upper profile, as long as broad or a little broader than long, 

 as long as postocular part of head ; eye longer than snout, 2^ to 2| 

 times in length of head, exceeding interorbital width and prseorbital 

 depth ; mouth rather small, f to f width of head, extending to between 

 nostril and eye ; teeth in 2 series, outer very small and slender, about 

 60 in upper jaw; 2 or 3 series of scales on the cheek, width of scaly part 

 about ^ diameter of eye. Gill-rakers short, 11 or 12 on lower part of 



Fig. 176. 



Tilapia macroj^/hihalma. 

 Type. 



anterior arch. Dorsal XV-XVIl 10-11 ; last spine longest, about J 

 length of head and | longest soft rays. Anal HI 8-9 ; third spine as 

 long as longest dorsal. Pectoral a little longer than head, reaching 

 vertical of origin of anal. Ventral reaching vent or anal. Caudal 

 deeply emarginate. Caudal peduncle 1^ to 1^ times as long as deep. 

 Scales finely denticulate, 32-34 ~; lateral lines g^r?- Brownish above, 

 silvery white beneath, uniform or with very indistinct numerous darker 

 vertical bars ; a brown opercular spot ; spinous dorsal with a dark and 

 light edge. 



Total length 80 millim. 



Lake Nyassa. 

 1-5. Types. L. Nyassa. 



6. Skel. 



Capt. E. L. Rhoados(P.). 



7. Ad. 



Kondowe to Karonga. 



A. Whyte, Esq. (C.) ; Sir H. 

 H. Johnston (P.). 



