TILAPIA. 



219 



deptli of prirorbital ; mouth moderate, about | width of head, extending 

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

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

 upper jaw ; 4 or 5 series of scales on the check, width of scaly ])art 

 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, y length of head, longest soft rays about ^. 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 leaching vent. Caudal 

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

 denticulate, 30-32 -Jj^ ; lateral lines yi^i' Brownish, Avith several 

 rather ill-defined daikbars; 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 Up[^er Zambezi. 



1. Hgr. Luciilhi R. at Luculla, Anoola. 



2. Hgr. Kaziingula, Upp. Zambesi. 



Dr. W. J. Arisorge (C). 

 Rev. L. Jalla (C.) ; 

 Turin Museum (P.). 



53. TTLAPIA SWYNNERTONI. 

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



Depth of body 2J to 2f times in total length, length of head 3' times. 



IV. 142. 



2'ila2>ia sivi/nnertoni. 

 Type. 



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

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



