TJLAPIA. 



203 



91. TILAPIA INORNATA. 

 Bouleng. Ann. & Mag. N. H. (8) ii. 1008, p. 242. 



Depth of body equal to length of head, o| to 3j times in total 

 length. Head a little over twice as long as broad ; snout rounded, with 

 straight or slightly convex upper profile, as long as broad, as long as 

 postocular part of head-; eye 2f to 3 times in length of head, exceeding 

 interorbital width, nearly twice as long as least prseorbital depth; mouth 

 small, 1^ to I width of head, extending to between nostril and eye ; teeth 

 very small, in 3 series, about 50 in outer series of upper jaw ; 2. or 3 

 series of scales on the cheek, width of scaly part not half diameter of 

 eye. Gill-rakers moderately long, 15 or 10 on lower part of anterior 



Tildjiid iaonuitd. 

 Type. 



arch. Dorsal XVI-XVII 11-12 ; spines increasing in length to the 

 last, which measures a little less than \ length of head ; longest soft 

 rays not longer. Anal HI 9 ; third spine a little more than J length of 

 head. Pectoral as long as head, not reaching origin of anal. Ventral 

 barely reaching vent. Caudal with crescentic emargination. Caudal pe- 



MJ-4 



duncle ]| times as long as deep. Scales finely denticulate, 34-30 yTFi'^ 



lateral lines 



25-28 



14>-18 



Total length 95 millim 



Silvery, back olive ; a dark opercular spot. 



Lake Nyassa. 

 1-2. Tyj)es. 



L. Nvass!), 



Caj^f. K. L. lU.oa.lo- (P.). 



