On Three new Freshioater Fishes. 485 



LXVI. — Descriptions of Three nexo Freshioater Fishes disco- 

 vered by Mr. G. L. Bates in South Cameroon. By G. A. 

 BOULENGER, F.R.S. 



Nannocharax ocellicauda. 



Depth of body 4^ to 5 times in total lengtli, length of head 

 4 times. Head twice as long as broad, deeper tlian broad; 

 snout rounded, feebly projecting, a little shorter than eye, 

 which equals length of postorbital part of head and inter- 

 orbital width. Gill-rakers short and few. Dorsal III 9-10, 

 originating above root of ventralsj equally distant from eye 

 and from root of caudal ; longest ray about | length of head. 

 Anal III 9. Pectoral much sliorter than head, not reaching 

 root of ventral. Lobes of caudal acutely pointed. Caudal 

 peduncle once and ^ as long as deep. Scales 50 p, 5 between 

 lateral line series and root of caudal ; lateral line incomplete, 

 reduced to a few tubercles. Yellowish in spirit, with a large 

 black, light-edged ocellus at the root of the caudal fin ; 

 vertical fins greyish, dorsal black in front. 



Total length 35 mm. 



Two specimens from the Ja River. 



This fish brings up to nine the number of species of Nanno- 

 charax. I have prepared the following synopsis for their 

 distinction : — 



1. Dorsal originating above ventrals, with 9 to 11 branched rays. 

 A. Lateral line complete. 



1. Less than 50 scales in lateral line, 4^ in transvei'se series above 



lateral line ; length of head 3§ to 4 times in total length. 

 Head not deeper than broad; depth of 

 body 55 to 5| times in total length ; 



pectoral as long as head, extendino- [(Gold Coast, Gaboon, Congo), 

 beyond root of ventral ; Sq. 42-46 ^. 1. N.fusciatus, Gthr., 1867 



Head deeper than broad ; depth of body 

 4| to 5 times in total length ; pec- 

 toral as long as head, extending be- 

 yond root of ventral ; Sq. 37-38 yf. . 2. N. brevis, Blgr., 1902 (Congo). 



Head deeper than broad ; depth of body 

 3f to 4j times in total length ; pec- 

 toral much shorter than head, not [(O'^owe) 

 reaching root of ventral ; Sq. 38-40 ll' 3. N. parvus, Pellegr., 1907 



2. 47 scales or more in lateral line, 5^ in transverse series above 



lateral line ; length of head 4 to o times in total length. 

 Head deeper than broad ; depth of body 



