TILAPIA. 



219 



depth of prpeorbital ; mouth moderate, about f width of head, extending 

 to between nostril and eye ; end of maxillary exposed ; lower jaw 

 slightly projecting ; teeth small, in 2 series, about 50 in outer row of 

 upper jaw ; 4 or 5 series of scales on the cheek, width of scaly part 

 equal to or a little less than diameter of eye. Gill-rakers short, 9 to 

 11 on lower part of anterior arch. Dorsal XIV-XV 10-11 ; last spine 

 longest, f length of head, longest soft rays about i. Anal III 8-9 ; 

 third spine as long as last dorsal. Pectoral about § length of head, not 

 extending to vertical of origin of anal. Ventral reaching vent. Caudal 

 rounded. Caudal peduncle as long as deep. Scales rather strongly 



°i_4 IS— *^ 



denticulate, 30-32 -Jj- ; lateral lines rrry?- Brownish, with several 

 rather ill-defined dark bars; a black opercular spot; a dark bar from 

 below the eye to the angle of the mouth ; vertical fins with small spots, 

 forming oblique streaks on the dorsal. 



Total length 85 millim. 



Angola and Upper Zambezi. 



1. Hgr. Luculla 11. at Luculla, Angola. 



2. Hgr. Kazungula, Upp. Zambesi. 



Dr. W. J. Ansorge (C). 

 Rev. L. Jalla (C.) ; 

 Turin Museum (P.). 



53. TILAPIA SWYNNERTONI. 

 Bouleng. Ann. & Mag. N. H. (7) xx. 1907, p. 50. 



Depth of body 1\ to 2f times in total length, length of head 3 times. 



Pig. 142. 



Tilcipia swynnertoni. 

 Type. 



Head twice as long as broad; snout obtuse, with straight or convex 

 upper profile, slightly broader than long, shorter than postocular part 



