186 



CICHLIDJE. 



0-14. Ad., hgr., Chiloango, Portug. Congo. Dr. W. J. Ausorge (C). 



15. Skel. ., ,, u 



16-17. Two of the L. Obeke, Upper Congo. M. P. Delhez (C). 



types. 



25. TILAPIA MARLE. 

 Bouleng. Proc. Zool. Soc. 1899, p. 122, pi. xi. fig. 1 ; Pellfgr. Mem. Soc. Zool. 

 France, xvi. 1904, p. 323. 



Depth of body If to 2f times in total length, length of head 2f to 3 

 times. Head If to 2 times as long as broad, with convex;; upper 

 profile ; snout rounded, about 1^ times as long as broad, as long as 

 or a little shorter than postocular part of head ; eye 2f (young) to 

 3g- times in length of head, 1 to 1^ times in interorbital width, 



Tig. 120 



Tilapia mariai. 

 Oguta. 



exceeding praeorbital depth ; mouth rather small, f- to f width of 

 head, extending to between nostril and eye ; teeth in 3 to 5 series, 

 outer very small, with very slender shafts, movable, 50 to 64 in upper 

 jaw ; 3 or 4 series of scales on the cheek, width of scaly part less than 

 diameter of eye. Gill-rakers short, 13 to 15 on lower part of anterior 

 arch. Dorsal XVI (rarely XV) 12-13; spines subequal from the fifth, 

 or last longest, ^ to | length of head ; longest soft ray § to once length 

 of head. Anal HI 10-11; third spine as long as or shorter than last 



