386 



SILUBIDiE. 



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

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

 Caudal peduncle 2 to 2| 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., type. 



2. Ad. 



3. Yg., one of the types of 



A. parkii. 



4. Ad. 



Fernando Po. 

 Cameroon. 



Niger. 



Gambia. 



Mr. C. L. Salmin(C). 

 Mr. L. Fraser (().). 



J. S. Budgett, Esq. (P.). 



2. ARIUS GIGAS, sp. n.*. 

 Arhs latiscutatus, part., Gunth. 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 



Pig. 298. 



Arms g'tfjas. 

 Half-grown. |. 



* The name refers to the large skeletons which were regarded by Gunther as the adults 

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

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

 spirit (total length 275 millim.). 



