482 



Annals of the South African Museum. 



n 



vertical of origin of anal. Ventral reaching to vent. Anal iii 11 ; 

 3rd spine not quite i length of head. Caudal rounded; caudal 

 peduncle as long as deep. Scales cycloid, 31 1|, lateral lines ff . 



Colour (of preserved specimen), dark brownish black above, lightish 

 beneath ; a dark opercular spot and 2 or 3 ill-defined black spots on 

 the side below upper lateral line ; soft dorsal and anal fins with light 

 and dark spots between their rays. 



FIG. 119. Tilapia kafuensis. Type. -|. 



One specimen, 298 mm. in length, from Bulawayo (Mr. F. D. 

 McKea.n) . 



It is also reported from the Kafue River arid from the Zambesi. 



2. TILAPIA INTERMEDIA, n. sp. 



Teeth slender, closely set, in 3 series on each jaw, 40-50 in outer 

 series on upper jaw. Depth of body 2f to 2f times in total length 

 excluding caudal, length of head 2f times. Head 1| to twice as long 

 as broad ; snout with straight upper profile, as long as broad, shorter 

 than postocular part of head ; eye 4 to 4 T V times in length of head, 

 | to | interorbital width, slightly longer than preorbital depth ; width 

 .of mouth about i width of head, extending to behind nostril ; scales 

 on cheek in 2 to 3 series, width of scaly part about equal to or a little 

 less than diameter of eye. Gill-rakers moderate, about 23 on lower 

 part of anterior arch. 



