TILAPIA. 



205 



Dorsal XVII-XVI1I 9-10 ; spines subequal from the fifth, ? to \ length 

 of head. Anal III 7 ; third spine a little longer than longest dorsal. 

 Pectoral \ length of head, not reaching vertical of origin of anal. 

 Ventral not reaching vent. Caudal rounded, feebly emarginate, covered 



Tilapia bilineata. 

 Type, after Pellegrin (Mem. Soc. Zool. France, 1904). f . 



with scales. Caudal peduncle slightly deeper than long. Scales cycloid, 



04 01_9«> 



30-32 jj-j; lateral lines -jj-. Brown above, yellowish beneath; two 

 black lateral bands, corresponding to the two lateral lines. 



Total length 180 millim. 



Aliina R , Upper Congo. — Types, in Paris Museum, examined. 



40. TILAPIA CRASSA. 

 Pellegr. Bull. Mus. Paris, 1903, p. 120, and Mem. Soc. Zool. Franco, xvi. 1904, 

 p. 32-1, fig. 

 Depth of body twice in total length, length of head 3 times. Snout 



Fig. 181. 



Tikijoia crassa. 

 Type, after Pellegrin (Mem. Soc. Zool. France, 1904). |. 



with slightly concave upper profile, as long as eye, a little longer than 



