20G 



CICHLIDJE. 



postocular part of head ; eye 3|- times in length of head, a little less 

 than interorbital width ; mouth extending to between nostril and eye ; 

 teeth very small, in 5 series; 3 series of scales on the cheek. Gill- 

 rakers short, 11 on lower part of anterior arch. Dorsal XVIl 9 ; 

 spines equal from the fifth, J length of head. Anal III 7 ; third spine 

 longer than longest dorsal. Pectoral f length of head, not reaching 

 vertical of origin of anal. Caudal rounded, slightly emarginate, covered 

 with scales. Caudal peduncle nearly as long as deep. Scales cycloid, 

 29 J J ; lateral lines ^. Olive; an ill-defined dark spot behind the eye 

 and another at the base of the origin of the soft dorsal. 



Total length 170 millim. 



Alima R., Upper Congo. — Type in Paris Museum. 



41. TILAPIA SPARRMANI. 



A. Smitli, 111. Zool. S. A£r., Fish. pi. v. (1840) ; Boulencr. Proc. Zool. Soc. 1899, 

 p. 119, and Poiss. 13a,ss. Congo, p. 462 (1901); Pellegr. Mem. Soc. Zool. 

 France, xvi. 1904, p. 319 ; Bouleng. Tr. Zool. Soc. xviii. 1911, p. 417. 



Chromis sparinanni, Giinth. Cat. Fish. iv. p. 269 (18(J2). 



Chromis nilotinis, part., Peters, Reise Mossanib. iv. p. 23 (1808). 



Tilapia fouloni, Bonleng. Ann. & Mag. N. H. (7) xvi. 1905, p. 017. 



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



Fie. 132. 



Tilap'ia sparrmani. 

 Type. 



times. Head If to 1| times as long as broad; snout with straight or 

 slightly convex or slightly conrave upper profile, broader than long, as 



