172 KNERIID^. 



f length of head. Dorsal II 8, originating above ventrals and at equal 

 distance from eye and from root of caudal, longest ray about f length of 

 head. Anal III 6, twice as distant from root of ventrals as from root 

 of caudal. Pectoral as long as head. Caudal deeply forked, with 

 pointed lobes. Caudal peduncle about once and f as long as deep. 

 90-102 scales in lateral line. Yellowish olive above, spotted or marbled 

 with brown, pale yellow below; a brown lateral band; a black dot at 

 base of ventral ; caudal spotted with black, the lower lobe sometimes 

 nearly entirely black. 



Total length 75 millim. 



South Cameroon. 



1-8. Ad. & hgr., types. Ja River (Congo System). G. L. Bates, Esq. (C). 



9. Skel. „ „ „ 



The following genus is provisionally referred to this family : — 



2. XENOPOMATICHTHTS. 



Xenopomklithys, Pellegr. Bull. Mus. Paris, xi. 1905, p. 14.5. 



Mouth small and toothless, inferior, transverse, sharp-edged. Gill- 

 opening very narrow, lateral ; outer surface of operculum bearing a 

 cup-shaped apparatus. Body moderately elongate, covered with small 

 scales. Dorsal and anal fins short, the former slightly behind vertical 

 of ventrals, which have 8 rays. Intestinal canal very long, forming 

 numerous convolutions. 



Mozambique. 



1. XEXOPOMATIGHTHYS AURICULATUS. 

 Xenopomiclitliys auriculatus, Pellegr. t. c. p. 146. 



Depth of body equal to length of head, 4^ times in total length. 

 Snout rounded, nearly as long as eye, which is perfectly lateral, 3 times 

 in length of head, and 1^ times in interorbital width; width of mouth 

 equal to diameter of eye. Dorsal II 8, originating at equal distance 

 from end of snout and from root of caudal. Anal II 6-7. Pectoral 

 with 15 rays. Caudal deeply notched. Caudal peduncle half as long as 

 deep. 60-65 scales in lateral line, about 12 between lateral line and 

 ventral. Yellowish grey, with a darker lateral band ; minute black dots 

 at the base of the dorsal, anal, and ventral fins. 



Total length 47 millim. 



Muza River. — Types in Paris Museum. 



