CYPEINIDiE. 213 



[I. Barbels absent or reduced to one pair. 



A. Less than 50 scales in lateral line. 



1. Last simple ray of dorsal strong and ossified, followed by 9 or 10 

 (rarely 11) soft rays. 



a. Barbel \ diameter o£ eye ; rounded papillaJ in front of and behind 



mouth. 

 Sc. 35 '^, 3, 14; ventrals below anterior rays o£ 



dorsal .- V. varicostoma, Blgr. 



b. Barbel minute or absent. 



a. Ventrals below middle of dorsal. 

 Sc. 31 ^, 21, 12 ; eye 4| times in length of head; 



barbel present V. tornieri, Stdr. 



Sc. 28-31 A, 21, 12 ; eye more than 4 times in length 



of head ; barbel absent T^. sandersi, Blgr. 



Sc. 30-35 %^^ 3-3i, 12-14; eye not more than 4 



times in length of head ; barbel present .... T'. steindachneri, Blgr. 

 /3. Ventrals below anterior soft rays of dorsal. 

 * Snout only a little broader than long. 

 Sc. 34-36 V|, 3, 12 ; eye 3i times in length of head . 1'. ruandce, Pappenh. 



** Snout much broader than long. 

 Sc. 30-35 ^?4f ■ 2-3, 12 ; eve 4 to 6 times in length. of 



head ; snout with tubercles V. heso, Riipp. 



Sc. 34-35 ^, 3, 12 ; eye 4 or 5 times in length of 



head ; no tubercles on snout V. I'laty stoma, Pappenh. 



Sc. 34-39 114!, 3-3^, 12-14; eye 3 to 3i times in 



length of head : very small tubercles on snout . V. latirostris, Blgr. 

 2. Last simple ray of dorsal slender and flexible. [& Thomps. 



Sc. 34-35 P^, 2^, 14; D. Ill 8-9 ; no barbel . . . V.neehpruitensh, Gilchr. 

 g(;_ 39_4o5ilZI, 31, 12 ; D. Ill 10 ; a minute barbel . V. ruwenzorii, Pellegr. 

 Sc. 43-46 „^I^, 4-5, IG; D. IV 10-11; a minute 



barbel V- maroccaniis, Gthr. 



B. More than 50 scales in lateral line; last simple ray of dorsal strong and 

 ossified. 

 Sc. 64_70-^34S' 9-10' 3--3i ; ^- IV 8-9 ; a minute 



barbel ^^. tanganica^, Big 



