240 



CTPEIOTD^E. 



Measurements (in millimetres). 



Total length (without caudal) 



117 

 33 



27 



15 



7 



7 



10 



7 



6 



9 



27 



17 



21 



102 



27 



23 



13 



6 



6 



9 



6 



6 



8 



23 



15 



19 



90 

 24 

 21 

 11 



H 



H 



8 

 5 

 5 



7 

 22 

 14 

 18 



Greatest depth 



Length of head 



Width of head 



Length of snout 



Diameter of eye 



Interorbital width 



Width of mouth 



Anterior barbel 



Posterior barbel 



Length of last simple ray of dorsal (ossified part) 



„ longest ray of anal 



,, pectoral 





Eight specimens, collected by the late Mr. Doggett in Lake Victoria in 1903, have 

 been presented to the British Museum by Col. Delme Radcliffe. A single specimen 

 was taken at Entebbe on June 26th, 1905, by Mr. Degen. 



This species and B.jacJcsoni, Gthr., are easily distinguished among the forms with 

 large non-serrated spine to the dorsal by the high number of scales between the lateral 

 line and the ventral fin coupled with the series of black spots along the side. 



This is probably the fish from Lake Victoria referred by Hilgendorf (Sitzb. Ges. 

 naturf. Freunde Berlin, 1888, p. 78) to B. trimaculatus of Peters, which differs in 

 having larger scales (30-34 *!*, 3, 14). 



B. nummifer differs from B. jacksoni, Gthr., from the headwaters of the Rufu River 

 in the Kilimandjaro district, in the longer posterior barbel and the shorter spinose 

 dorsal ray. The specimens from Lake Rukwa referred to B. jacksoni by Hilgendorf 

 and Pappenheim (Sitzb. Ges. naturf. Freunde Berlin, 1903, p. 269), although smaller 

 than the type, are described as having the snout longer than the eye, and therefore 

 surely belong to a distinct species, which differs, besides, in the longer barbels and 

 in the shorter spinous dorsal ray. For this species I have proposed the name 

 B. pappenheimi 



