160 



CICHLIDtE. 



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

 III 0-10; third spine a little shorter than longest dorsal. Pectoral 

 g lengili of head, reaching beyond origin of anal. Ventral not reaching 

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



cycloid, 2 7-.30 i~^; lateral lines 



17-20 

 12-V6' 



Brown (formaline specimens) ; 



Tilapia linnelli. 

 Type. §. 



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

 and anal fins deep black. 



Total length 200 millim. 



Elephant Lake. Cameroon. — Type in Stockholm Museum. 



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



types. 320 in. Prof. E. Lonnberg (C). 



9. TILAPIA MACROCHIR. 



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



Depth of body 1| to 2| times in total length, length of head 3 times. 

 Head If to If times as long as broad; ui)per profile descending in a 

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

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

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

 width, equal to or a little less than prreorbital depth ; mouth ratluT 

 small, \ to I width of head, extending to between nostril and eye ; 

 teeth in o to 8 series, 70 to 100 in outer series of upper jaw; 2 or o 



