ALESTES. 199 



adipose eyelid well developed ; interorbital region convex, 2 to 2§ times 

 in length of head ; maxillary not extending to below anterior border of 

 eye; 14 teeth (§) in upper jaw, 10 (5) in lower. Gill-rakers shorter 

 than gill-lamellae, 17-20 on lower part of anterior arch. Dorsal III 8, 

 originating above ventral, at equal distance from end of snout and from 

 caudal, longest ray as long as head. Anal III 15-16. Pectoral nearly 

 as long as head. Caudal forked, with long pointed lobes. Caudal 

 peduncle a little longer than deep. Scales without anastomosing canals, 

 39-41 gf, 2 between lateral line and root of ventral. Silvery, back 

 olive ; scales of upper half of body black-edged and with one or several 

 dark spots ; pectorals sometimes blackish ; caudal red. 



Total length 400 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 



1. One of the types. Upoto. Capt. Wilverth (C). 



2. Ad. Monsembe. Rev. J. H. Weeks (P.). 



3. Hgr. Coquilhatville. M. P. Delhez (C). 



4. Hgr. Leopoidville. „ 



5. ALESTES STUHLMANNI. 

 Pieff. Thierw. O.-Afr., Fische, p. 44 (1896). 



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

 Head twice as long as broad, a little longer than deep ; snout as long 

 as eye, which is lateral and 4 times in length of head ; adipose eyelid 

 much developed; interorbital region convex, its width 3 times in length 

 of head ; 16 teeth (?) in upper jaw, 10 (^) in lower ; lower border of 

 second suborbital longer than eye. Gill-rakers long and slender, very 

 closely set, 58 on lower part of anterior arch. Dorsal II 8, just behind 

 vertical of base of ventrals, equally distant from occiput and from 

 caudal, longest ray a little shorter than head. Anal III 20. Pectoral 

 a little shorter than head, not reaching ventral. Caudal deeply forked. 

 Caudal peduncle as long as deep. Scales with radiating canals, 36 ^, 

 lj between lateral line and root of ventral. Uniform silvery ; caudal 

 dark-edged. 



Total length 160 millim. 



Kingani River, German East Africa. — Described from the type 

 specimen in the Berlin Museum. 



