174 



CICHLID^. 



Chromis rangii, Rochebr. Actes Soc. Linn. Bord. (4) vi. 1883, p. 133. 

 Tilapia mkrocephala, Boiileng. Proc. Zool. Soc. 1899, p. 114; Lonnb. Ann. & Mag. 

 N. H. (7) xii. 1903, p. 41. 



Depth of body 2 to 2^ times in total length, length of head 2| to 

 3 times. Head If to 2 times as long as broad ; snout rounded, with 

 straight or convex upper profile, as k)ng as broad or a little broader than 

 long, f to f postocular part of head ; eye 3 (young) to 5 times in length 

 of head, 1 (young) to If times interorbital width, much shorter than 

 pncorbital depth in adult ; mouth rather small, J to f width of head, 

 extending to below nostril or a little beyond ; teeth in 3 (young) to 



_Fig.lll. 



Tilapia heudcloli 



7 series, 40 (young) to 1 10 in outer series of upper jaw ; 2 or 3 series of 

 scales on the cheek, width of scaly part not more than diameter of eye. 

 Gill-rakers short, 15 to 19 on lower part of anterior arch. Dorsal XV- 

 XVI (rarely XIV or XVII) 11-13; spines subequal from the sixth, or 

 last longest, f to ^ length of head ; longest soft ray | to | length of 

 head. Anal III 8-11; third spine y to | length of head. Pectoral 1^^ 

 to 1-j times as long as head, reaching vertical of origin of anal, or beyond. 

 Ventral reaching anal or vc^nt, or not quite so far. Caudal truncate or 

 feebly but distinctly emarginate. Caudal peduncle deeper than long. 

 Scales cycloid, 27-30 f^ijy ; lateral lines ^'^^. Olive above, gol(lt\; 



