288 SILVRLDA. 



distant from caudal as from end of snout ; its spine slender, feebly 

 serrated behind, £ to f length of head, produced into a short filament. 

 Anal 46-50, 4 anterior rays simple, the following gradually decreasing 

 in length. Pectoral reaching ventral, its spine moderately serrated on 

 inner side and stronger and a little longer than that of dorsal. Caudal 

 deeply forked, with pointed lobes. Caudal peduncle If to ]| times as 

 long as deep. Silvery, pale brownish on the back, with or without a 

 dark lateral streak ; an ill-defined dark blotch above the pectoral fin ; 

 fins Avhitish. 



Total length 180 millim. 



Liberia, Gaboon. — Type in Leyden Museum. 



1. Hgr. Gaboon. 



2-4. Hgr. & yg. Lambarene. Ogowe. Miss Kingsley (C). 



5. Hgr. ., „ Dr. W. J. Ansorge ((!.). 



6. EUTROPIUS DEBAUWI. 



Bonleng. Ann. Mus. Congo, Zool. i. p. 1:58, pi. 1. fig. 2 (1900), and Poiss. Bass. 

 Congo, p. 270 (1901). 



Depth of body 4 to i\ times in total length, length of head 5 times. 

 Head ]\ to If times as long as broad ; snout broad, projecting slightly 

 beyond mouth, as long as eye ; latter perfectly lateral, 3^- times in 

 length of head, twice in interoibital width ; width of mouth equal to 

 interorbital width ; vomero-pnlatine teeth forming a narrow unin- 

 terrupted band. Nasal barbel \ to \ length of head, maxillary barbel 

 f, outer mandibular \. Dorsal I -5, entirely in advance of ventrals, 

 about 2\ times as distant from caudal as from end of snout, its spine 

 feebly serrated in front and behind. Anal 38-45. Pectoral not reaching 

 ventral, its spine feebly serrated on both sides. Caudal deeply forked. 

 Caudal peduncle longer than deep. Yellowish ; a blackish streak on 

 each side of the tail, and another extending on upper lobe of caudal. 



Total length 70 millim. 



Uerre, Upper Congo. — Type in Congo Museum, Tervueren. 

 1. Yg., one of the types. Uerre. M. De Bauw (C). 



7. EUTROPIUS MENTALIS. 

 Eidrophis congensis (non Leach), Giinth. Proc. Zool. Soc. 1899, p. 730. 

 EutropiuH mentalis, Bouleng. Poiss. Bass. Congo, p. 2G9 (1901) ; Giinth. Proc. 



Zool. Soc. 1902, ii. p. 335. 



Depth of body 3 to 4 times in total length, length of head U to 5 



