206 



chaeacinidj:. 



Werner, Sitzb. Ak. Wien, cxv. i. 190G, p. 1127 ; Bouleng. Fish. Nile, p. 122, 



pi. xix. figs. 1 & 2 (1907). 

 Chalceus guile, Cuv. & Val. t. c. p. 255. 

 Brachyalestes nurse, Giinth. Cat. Fish. v. p. 314 (1864) ; Fowler, Proc. Ac. Philad. 



1906, p. 444, fig. 

 Brachyalestes ruppellii, Giinth. t. c. p. 315 ; P£eff. Thierw. O.-Afr., Fische, p. 43 



(1896). 

 Alettes leuciseus, Giinth. Ann. & Mag. N. H. (3) xx. 1867, p. 114. 

 Alestes ruppellii, Giinth. Petherick's Trav. ii. p. 343 ; Vincig. Ann. Mus. Genova, 



xxxix. 1898, p. 257. 

 Alestes senegalensis, Steind. t. c. p. 545, pi. ii. fig. 2. 

 Brycinus nurse, Eigenm. Proc. U.S. Nat. Mus. xxxiii. 1907, p. 29. 



Depth of body 2-§- to 3f times in total length, length of head 3^ 

 (young) to 4f times. Head If to 2 times as long as broad, as long as 

 deep or a little longer ; snout rounded, not longer than eye, which is 

 lateral and 2\ (young) to 4 times in length of head ; interorbital region 

 moderately convex, its width 2 J to 2f times in length of head ; maxillary 

 not reaching to below anterior border of eye ; 14 or 16 teeth (-^-) in 

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



Fig. 155. 



"^sggia 



Alestes nurse. 

 Blue Nile (F. N.). ±. 



than eye in adult. Gill-rakers moderately long, 16-20 on lower part 

 of anterior arch. Dorsal II 8 (rarely 7), originating above base of 

 ventrals, its base equally distant from centre or posterior border of eye 

 and from root of caudal ; longest ray as long as or a little shorter than 

 head. Anal III 11-15 (rarely 16). Pectoral a little shorter than head. 

 Caudal deeply forked, lobes pointed. Caudal peduncle 1 to 1| times 

 as long as deep. Scales with radiatiDg and more or less distinct 



