Freshwater Fishes from Portuguese Guinea. 375 



to 3 times in length of head ; mouth subinferior ; lips 

 moderately developed ; two barbels on each side, anterior ^, 

 posterior ^ diameter of eye. Dorsal III 8, equally distant 

 from centre of eye and from base of caudal, border feebly 

 concave ; last simple ray not enlarged, as long as head. 

 Anal III 5, not reaching caudal. Pectoral f to 4 length of 

 head, not quite reaching ventral ; base of latter below ante- 

 rior rays of dorsal. Caudal peduncle li to 1^ times as long 

 as deep. Scales radiately striated, 23-25 |f, 2-2^ between 

 lateral line and ventral, 12 round caudal peduncle. Yellow 

 above, silvery below, scales on back and sides finely speckled 

 with brown, with a more or less distinct dark brown spot at 

 the base ; a black straight lateral band from the end of the 

 snout, through the eye, to the base of the caudal ; fins yellow, 

 dorsal and caudal orange at the base ; a blackish spot at the 

 end of the longest rays of the dorsal. 



Total length 65 millim. 



Numerous specimens from the Geba and Culufi Rivers. 



Near B. ahlabes, Blkr. Distinguished by the much larger 

 eye. 



Si/nodofitis ansorgii. 



Depth of body 3 to 3^ times in total length, length of head 

 3| to 4 times. Head a little longer than broad^ granulate 

 above from between the eyes ; snout rounded, as long as post- 

 ocular part of head ; eye supero-lateral, 3^ (yo""g) to 4^ 

 times in length of head, 1'^ to 1| times in interorbital width ; 

 lips moderately developed ; prsemaxillary teeth forming a 

 short and very broad band ; movable mandibular teeth ^ to ^ 

 diameter of eye, 60 to 80 (50 in young) in number. Maxillary 

 barbel with a broad marginal membrane in its basal third, 1 

 to I;^ times length of head, reaching between anterior fourth 

 and posterior third of pectoral spine ; outer mandibular barbel 

 1^ to 2 times as long as inner, former with long slender 

 branches, latter with tubercular ramifications. Gill-opening 

 not extending downwards beyond root of pectoral spine. 

 Occipito-nuchal shield granulate like the occiput, obtusely 

 tectiform, 1^ to 1| times as long as broad, posterior processes 

 rounded or obliquely truncate. Humeral process much longer 

 than broad, granulate, not keeled, obtusely pointed, extending 

 as far or not quite so far as occipito-nuchal process. Dorsal 



1 7 ; spine nearly straight, as long as or longer than head, 

 not serrated, terminating in a long filament. Adipose dorsal 



2 to 3 times as long as deep, 2^ to 3 times as long as its 

 distance from rayed dorsal. Anal IV-V 7-8, rounded. 



