222 MR. G. A. BOULEifGER ON [June 17, 



knowledge of the fauna of the Tana system, for the first information 

 on which we are indebted to Dr. J. W. Gregory.'^ 



A striking feature in the composition of this fauna is the presence 

 of several species of the Cyprinid genus JBai'bus, agreeing in the 

 large scales and the position and structure of the doi-sal fin, 

 the last simple i-ay of which is very large, osseous, and non-serrated, 

 yet differing strikingly in the buccal characters. Two of these 

 species had been described by Dr. Giinther as Barhus tanensis 

 and B. intermedius (Riippell) ; thi-eeare here added, and although 

 evidently nearly related they would have to be referred to as 

 many genera, viz. : Barbies, Laheoharhus, and Capo'eta. Labeo- 

 barbus has already been relegated to the synonymy of Barbus by 

 Giinther '■*, and I now feel compelled to do the same with Capo'eta, 

 with all the more confidence, since new forms recently discovered 

 in Morocco suppoi-t the same conclusion ^. 



CYPRINIDiE. 



1. Labeo forskalii Rlipp. 



2. Labeo (Tylognathus) moxtanus Gthr. 



3. Barbus tanensis Gthr. 



4. Barbus hindii, sp. n. (Plate XVI. fig. 1.) 



Depth of body 2|- to 3 5 times in total length, length of head 

 4 to 4-^ times. Snout rounded, feebly projecting beyond the 

 mouth, 1^ to 1| times as long as the eye, the diameter of which 

 is 4 to 44 times in the length of the head and 1^ to twice in 

 the intei'ocular width ; width of the mouth about half that of 

 the head ; lips feebly developed ; two pairs of barbels, the first 

 as long as the eye or a little longer, the second a little longer 

 than the first but not more than 1| the diameter of the eye. 

 Dorsal lY 9-10, fourth ray very sti'ong, straight, bony, not 

 serrated, as long as the head or longer ; the fin is notched and 

 originates above the fii'st rays of the ventral, at equal distance 

 from the end of the snout and the root of the caudal or a little 

 nearer the former. Anal III 5 ; longest ray | to 4- the length of 

 the head and narrowdy sepaiuted from the I'oot of the caudal. 

 Pectoral pointed, nearly as long as the head, not reaching the 

 ventral. Caudal deeply forked. Caudal peduncle 1^ to 1| as 

 long as deep. Scales 25-29 ^^^, 2 between the lateral line and 

 the root of the ventral. Olive-brown above, silveiy below ; fins 

 greyish, 



I'otal length 240 millim. 



Several specimens. 



Distinguished from B. tanensis by the shorter barbels. 



1 Cf. Giinther, " Report on the Collection of Reptiles and Fishes made by Dr. J. 

 W. Gregory during his Expedition to Mount Kenya," P. Z. S. 1894, pp. 84-91, 

 pis. viii.-xi. 



2 Cat. Fish. vii. p. 84. 



3 Cf. Boulenger, Ann. & Mag. N. H. (7) ix. 1902, p. 124. 



