Lakes of the Cameroon Mountain. 139 



without caudal ; length of head 3£ to 3^ times in total length. 

 Snout rounded, 2\ times (or slightly more) in length of head. 

 Diameter of eye (of these large specimens) 6 to 6§- times in 

 length of head. Interorbital width about equal to length of 

 snout, thus about 2\ to 2| times in length of head. Mouth 

 inferior; lips well developed, lower continuous. Barbels two 

 on each side, the posterior a little longer than the anterior, 

 exceeding the latter by a fourth or a fifth of its length ; 

 the anterior is equal to diameter of eye or a little (-1- to jL) 

 longer, the posterior is 1^ times diameter of eye; the distance 

 between the barbels is quite intermediate between the length 

 of anterior and posterior barbels. Dorsal III 9; last simple 

 ray rather strong, bony, not serrated, slightly curved, a little 

 more than half as long as head (55 °/ ) ; free edge of the fin 

 emarginate, its distance from the occiput less than its distance 

 from the caudal. Anal III 5, longest anal ray decidedly 

 longer than longest dorsal ray, and measuring § (68 °/ ) 

 length of head. Pectoral about § length of head, not reach- 

 ing ventral, latter below anterior part of dorsal. Caudal 



4-41 



peduncle 1^ to H times as long as deep. Scales 20-27 -p 9 , 

 2 (or 2\) between lateral line and root of ventral, 12 round 

 caudal peduncle. Two specimens, respectively 360 and 

 435 mm. in length. 



This Barbus is no doubt nearly related to B. Batesii, 

 Boulenger, but differs from that species in several respects. 

 Since Mr. Boulenger described * B. Batesii on a single speci- 

 men from Kribi River, Southern Cameroon s, he has received 

 several specimens from 185 to 340 mm. long, and he has in the 

 most friendly way favoured me with a fresh description (for 

 which I owe him my best thanks) of this species, based on 

 the increased material. A comparison with this description 

 reveals that Barbus Linnellii differs from B. Batesii in several 

 particulars. The former has a comparatively larger head and 

 longer snout. Its interorbital width is larger, but the barbels, 

 and the distance between them, when compared with the 

 diameter of the eye are smaller. The dorsal is lower, but the 

 anal is rather higher when compared with the length of 

 the head. The scales are fewer in number and larger, as 

 may readily be seen. The two forms must therefore be kept 

 distinct, even if Barbus Linnellii of the Elephant Lake be 

 regarded as derived from B. Batesii through isolation. 



The Museum, Gothenburg, 

 Jan. 6th, 1904. 



* Proc. Zool. Sue. 1903, vol. i. p. 25. 



