Lakes Albert Edward and Kivu. G33 



1. TiLAPiA, A. Smith, 1840. 



Scales cycloid. Teetli in several series, the outer usually 

 bicuspid, the inner tricuspid. 

 Africa and Syria. 



1. Tilapia nilotica, Linn. 

 Bouleng. Cat. Afr. Fish. iii. p. 162, fig. 106. 



This species extends from the Nile through Lakes Albert, 

 Albert Edward, and Kivu to Tanganyika. 



2. Tilapia ediiardiana, Bouleng., 1912. 

 Bouleng. Cat. Afr. Fish. iii. p. 166, fig. 107. 



Lake Albert Edward watershed of Mount Ruwenzori and 

 Lake Gaugu. 



Closely related to T. variabilis of Lake Victoria. 



2. Haplocheomis, Hilgendorf, 1888. 



Scales ctenoid. Teeth in 2 or more series, conical, or 

 outer bicuspid and inner tricuspid. 

 Africa and Syria. 



Si/nopsis of (he Species. 



I. Albert Edward species. 



A. Jaws equal or lower feebly projecting. 



1. 7 to 9 gill-rakers on lower part of anterior arch. 



1. schubotzi. 



2, 9 to 12 gill-rakers on lower part of anterior arch. 



Eye 3| in head (in specimens of 80 to 90 mm.) ; 



maxillary not reaching eye 2. j}appenheimi. 



Eye 3 in head (in a specimen of 80 mm.) ; scales 

 on chest very small, 8 between pectoral and 

 pelvic fins 3. eduardii. 



Eye 2f in head (in a specimen of 80 mm.) ; scales 

 on chest moderate, 4 between pectoral and 

 pelvic tins 4. nigripinnis. 



B. Lower jaw distinctly projecting 5. squamipinnis. 



II. Kivu species. 



A. Jaws equal or lower feebly projecting. 



1. Teeth in 3 to 5 series, 40 to 00 in outer series of upper jaw (in 

 specimens of 75 to 120 mm.) ; 7 to 9 gill-rakers on lower part 

 of anterior arch. 

 Pectoral reaching vent, origin of anal, or a little 



beyond 6. (/raueri. 



Pectoral reaching middle of anal 7. adolphi-frederici. 



Ann. <fc Mag. N. Hist. Ser. 9. Vol. viii. 41 



