386 SILUEID.E. 



Pectoral spine similar to dorsal. Ventral reaching, or nearly reaching, 

 origin of anal. Caudal deeply notched, with long, pointed lobes. 

 Caudal peduncle 2 to 2J times as long as deep. Olive-brown above, 

 silvery on the sides, white beneath ; distal half of pectoral, ventral, and 

 anal fins brown or blackish. 



Total length 520 millim. 



Gambia, Niger, Cameroon, Fernando Po, Congo. 



1. Hgr., ty[)e. Fernando Po. 



2. Ad. (!ameroon. Mr. C..L. Sahnin (C). 

 i\. Y/i"., ono of the typo.s of Niger. Mr. L. Fraser (('.). 



4. Ad. Gambia. J. S. Budgett, Esq. (P.). 



2. ARIUS GIGAS, sp. n. *. 

 Arius lat/.snifafiis, ]iart., Giintli. Cat. Fish. v. p. 151 (1864) ; Bouleng. Poiss. 

 Bass. Congo, p. 300 (1901). 



Depth of body 4 times in total length, length of head 3| times. 

 Head slightly longer than broad, the posterior part of its upper surface 



Arius (jKjds. 

 Tlalf-iirowii. |. 



* The iiame refers to the large skeletons vhich were regarded by Giinther as the adults 

 of his A. latiscutatus, which differs in the palatal dentition ; but the description of the 

 external characters, as here given, is necessarily taken from the much smaller specimen iu 

 spirit (total length 275 millim.). 



