12 Mr. G. A. Boulenger on Four new Fishes. 
Total length 170 millim. 
A single specimen from the mouth of Lake No. 
Well characterized by the extraordinary development of 
the dorsal fin. 
Among the Synodontis obtained by Mr. Loat in the White 
Nile I may mention S. frontosus, Vaill., S. nigrita, C. & V., 
S. sorex, Gthr., S. batensoda, Riipp., and S. membranaceus, 
Geoffr. Having examined a good number of specimens of the 
latter two species, from the Nile and Senegal, I wish to point 
out that S. membranaceus, Vaill.,=S. batensoda, Riipp., and 
S. Guenthert, Vaill.,= S. membranaceus, Geoffr. ‘The second 
differs from the first, in addition to the narrower isthmal 
space, by the much larger size, the lower number of man- 
dibular teeth, the broader fringe to the maxillary barbels, the 
presence of a fringe on the outer mandibular barbels, and the 
absence of a serration to the operculum. 
IlI.—Diagnoses of Four new Fishes discovered by Mr. J. E. S. 
Moore in Lakes Albert and Albert Edward. By G. A. 
Bou.encer, F.R.S. 
Barbus Eduardianus. 
ID 1, IN, Gh) lbs Text, BE. lly thm oe 
Depth of body 84 times in total length, length of head 33 
times. Snout rounded, nearly twice as long as eye, which is 
64 times in length of head and 23 in interorbital width ; 
barbels two pairs, subequal, nearly as long as eye. Third 
dorsal ray very strong, bony, not serrated. Longest anal ray 
2 length of head. Pectorals reaching base of ventrals. Ven- 
trals entirely in advance of origin of dorsal. Caudal] peduncle 
12 as long as deep. 3 scales between lateral line and root of 
ventral. Olive-brown above, golden beneath, the scales 
darker at the base. 
Total length 430 millim, 
Albert Edward Nyanza. A single specimen. 
Barbus Fergusont. 
D412. A. 7. 11. lateGaatemliettrye. 
Depth of body 4 to 43 times in total length, length of head 
Ai times. Snout rather pointed, nearly twice as long as eye, 
which is 5 to 53 times in length of head and 12 to 2 in inter- 
