2G2 



CTCIILID.E. 



90. TILAPIA BUEVIS. 

 Bouleno. Ann. Si Mug. N. H. (S) ii. 1908y p. 243. 



Depth of body 2| times in total .length, length of head 2| times. 

 Head twice as long as broad ; snout rounded, with very convex upper 

 profile, broader than long, shorter than postocular part of head ; eye 

 longer than snout, 2-g- times in length of head, exceeding interorbital 

 width and prseorbital depth ; mouth rather small, f width of head, 

 extending to below anterior border of eye ; teeth very small, in 2 or 3 

 series, about 80 in outer series of upper jaw ; 3 series of scales on the 

 cheek, width of scaly part about -J diameter of eye. Gill-rakers short, 

 8 on lower part of anterior arch. Dorsal XV 12 ; spines increasing in 

 length to the last, which measures about -J- length of head ; soft rays 



Fig. 177. 



Tilapia hrevis. 

 Type. 



scarcely if at all longer. Anal III 9 ; third spine a little shorter than 

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

 of anal. Ventral reaching origin of anal. Caudal deeply emarginate. 

 Caudal peduncle as long as deep. Scales finely denticulate, 31-32 ~, ; 

 lateral lines j^. Silvery, back brownish ; a dark brown opercular 

 spot; a dark brown band on each side, from the nape to the root 

 of the tail. 



Total length 70 millim. 



Lake Nyassa. 



1-2. Types. L. Nya.^sii. Capt. E. L. lllioadc- (P.). 



