ALESTES. 



219 



Head nearly twice as long as broad, longer than deep, its width much 

 less than its length to occiput; snout feebly projecting beyond lower jaw, 

 once and f diameter of eye, which is 4 times in length of head; adipose 

 eyelid feebly developed ; interorbital width nearly half length of head ; 

 maxillary not extending to below anterior border of eye; 18 teeth (^) 

 in upper jaw, 10 (|) in lower ; lower border of second suborbital as long 

 as or a little longer than eye. Gill-rakers moderately long, 18-19 on 

 lower part of anterior arch. Dorsal II 8, considerably behind vertical 

 of base of ventrals, originating much nearer caudal than end of snout, 

 longest ray about f length of head. Anal III I'J-IS. Pectoral as long 



Fig. 164. 



Alestes rhodojileura. 

 Type (Tr. Z. S. 1906). i. 



as head, not reaching ventral. Caudal forked. Caudal peduncle If to 



2 times as long as deep. Scales with numerous anastomosing canals, 



41. 

 28-29 p, 1 between lateral line and root of ventral. Olive-green above, 



silvery below, with an ill-defined pink band along each side ; a large 



blackish blotch on caudal peduncle at root of caudal. 



Total length 300 millim. 



Lake Tanganyika. 



1. Type. Tanganyika. Prof. J. E. S. Moore (C). 



2. Type. Nyamkolo. Dr. W. A. Cuunington (C). 



3. Type. Mtondwe Bay. „ 

 4-5. Types. Lo£u. ,, 



