OF FISHES FEOM LAKE TANGANYIKA. 25 



extending quite so far as the occipito-nuchal shield, which is 1| as long as broad and 

 reaches the first soft ray of the dorsal. Anal III 7. Caudal deeply bifurcate. Skin 

 smooth. Pale reddish brown above, with very numerous blackish-brown round spots, 

 which are smallest on the head and nape ; lower parts and barbels white, unspotted ; 

 ventrals yellow ; dorsal and caudal broadly edged with yellow. 



Total length 240 millim. 



A single specimen from Sumbu. 



29. Malapterurus electricus Gm. 



The Electric Cat-fish is widely distributed, being on record from the Nile, the 

 Niger, the Ogowe, and the Congo. 



Cypkinidx 



30. Labeo, sp. inc. 



An unmistakable figure of a Labeo is among Mr. Moore's sketches, and although 

 the specimen is not represented in the collection entrusted to me for description, I 

 have included the fish as being the only representative of the Cyprinoids yet found 

 in Tanganyika. The specimen from which the drawing was made was of large size, 

 and therefore could not be preserved under the difficult circumstances to which 

 allusion has been made in the introduction to this memoir. 



Characinid^e. 



31. Alestes macrolepidotus C. & V. 



Occurs in the Nile, the Senegal, the Niger, and the Congo. 



32. Alestes macrophthalmus Gthr. 



This fish was known only from the Ogowe. 



33. Hydrocton forskali Cuv. 



Occurs in the Nile, the Senegal, and the Niger. 



CYPEINODOKTIDi). 



34. Haplochilus takganicakus, sp. n. (Plate VI. fig. 3.) 



Body compressed, its depth 4 times in total length; length of head 4£ times. 

 Snout depressed; lower jaw projecting beyond the upper; eye a little longer than 

 snout, a little shorter than interorbital width, 3 times in length of head. Dorsal 13, 

 originating at equal distance from the head and the caudal fin ; the first ray corresponds 

 to the 18th scale of the lateral line ; posterior rays longest, § length of head. Anal 28, 

 ariginating below extremity of pectoral. Pectoral f length of head, extending far 

 beyond root of ventral. Caudal feebly emarginate. Caudal peduncle twice as long as 



vol. xv. — part r. No. 4. — December, 1898. e 



