160 



CICHLID.^. 



quite ^ length of liead ; longest soft ray about f length of head. Anal 

 III 9-10; third spine a little shorter than longest dorsal. Pectoral 

 I length of head, reaching beyond origin of anal. Ventral not reaching 

 vent. Caudal truncate. Caudal peduncle as long as deep. Scales 

 cvcloid, 27-.30 ,^=fT^; lateral lines |^^. Brown (formaline specimens) : 



Fi-j. 104. 



Tilapia linnel'i. 

 Type. f. 



pectoral fins lighter; male with the chin, throat, belly, and ventral 

 and anal fins deep black. 



Total length 200 millim. 



Elephant Lake, Cameroon. — Type in Stcnkholm Museum. 



1. One of the Elephant Lake, nr. Cameroon Mt., Mr. G. Linnell (C.) ; 



types. ;320 m. PioE. E. Loiuiberg (C). 



9. TILAPIA MACROCHIR. 

 Bouleng. Ann. & Mag. N. H. (8) x. 1912, p. 139. 



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

 Head Jf to l-f times as long as broad; Uj)per profile descending in a 

 strong curve, often \ery abrupt in front ; snout rounded, sometimes with 

 concave upper profile, a little broader than long, shorter than postocular 

 part of head ; eye 4 to 5| times in length of head, f to |- interorbital 

 width, equal to or a little less than prjeorbital depth ; mouth rather 

 small, i to f width of head, extending to between nostril and eye ; 

 teeth in o to S series, TO to 100 in outer series of upper jaw ; 2 or 3 



