ncic Fishes from the Upper Congo. \'2\\ 



in total Icngtl), lengtli of head 2 J times. Snout as long as 

 diameter of eye, which is 8| in length of head and eriuals 

 intcrorbital width ; maxillary extending to below anterior 

 third of eye ; 4 series of scales on the cheek ; opercle naked (?). 

 Gill-rakers long and slender, about 20 on lower part of ante- 

 rior arch. Dorsal XIII 11 ; spines subequal from the sixth, 

 nearly ^ length of head and ^ longest soft rays, which are 

 ))roduced and filiform. Pectoral as long as head. Ventral 

 with produced outer rays, reaching anal spines. Anal 1118; 

 third spine as long as and stronger than longest dorsal spine. 

 Caudal rounded. Caudal peduncle a little deeper than long. 

 Scales cycloid, 30 y\ > ^'^^- '• fo* Olive, with yellowish spots 

 occupying the centres of the scales ; a rather indistinct dark 

 lateral streak ; vertical fins blackish, with round yellow spots. 



Total length 175 millim. 



A single specimen. 



Synodontis jyleurojjs. 



Prsemaxillary teeth in 6 transverse series ; mandibular teeth 

 17, uncinate, simple, measuring ^ diameter of eye, forming 

 a small fascicle; no posterior villiform mandibular teeth. 

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

 length. Head little longer than broad, flat on the crown ; 

 snout triangular, broader than long ; eye perfectly lateral, Just 

 visible from below as well as from above, its diameter 1| in 

 length of snout, 3^ in length of head, 2^ in interorbital 

 width. Gill-cleft very narrow, not extending below base 

 of pectoral. Maxillary barbels small, simple, hardly reaching 

 base of pectoral ; mandibular barbels fringed, outer twice as 

 long as median and half as long as maxillaries. Dorsal It 7 ; 

 spine not serrated. Adipose fin small, ^ length of head, 

 shorter than its distance from the dorsal. Humeral process 

 simply granulate, obtusely pointed, not extending quite as 

 far as the occipito-nuchal shield, which is 1^ as long as 

 broad and does not extend beyond the first soft ray of the 

 dorsal. Anal IV 8. Caudal deeply bifurcate. Skin smooth. 

 Brown above, whitish beneath ; fins greyish white, with a 

 blackish stripe along each lobe of the caudal. 



Total length 170 millim. 



A single specimen. 



Prof. L. Vaillant has recently published a monograph of 

 this genus (Nouv. Arch, du Mus. (3) vii. & viii. 1895-96). 

 Eight species are recorded by him from the Congo basin, 

 and may be distinguished, together with the one now added, 

 by means of the following synopsis : — 



