BAGEUS. 305 



Head 1| to 1^ times as long as broad ; last ray 

 of dorsal in advance of ventral ; maxillary 

 barbel extending to end of pectoral or a 

 little beyond in the adult, to ventral in the 

 young 4:. B. degeni, Blgr., p. 311. 



B. Distance between rayed dorsal and adipose fin at least equal to base of 

 latter. 

 Head not moj'e than 1^ tim^s as long as broad ; 



maxillary barbel much longer than head ; 



anal with 10 or 11 rays 5. B. urostigma, Vincig., p. 312. 



Head nearly twice as long as broad ; maxillary 



barbel shoiter than head 'o. B. meridional is, Gthr., j). 312. 



11. Occipital process not longer than eye, 

 widely separated from first interneural 

 bone ; head 1^ times as long as broad ; 

 rayed dorsal and adipose fin narrowly 

 separated ; maxillary barbel extending 

 beyond base of ventral; anal with 11 

 rays (7 bi-anched) 1. B. id>ai)</ei)sis, Blgr., p. 313. 



1. BAGRUS BAYAD. 



Silurii.s hajdd, Forsk. Descr. Anim. p. 6G (1775). 



Porcus har/ad, I. Geoffr. Descr. Egypte, Poiss. p. 303, pi. xv, figs. 1 & 2 (1827). 



Bagrns bayad, Riipp. Beschr. n. Fiscbe Nil, p. 5 (1829); Cuv. & Val. Hist. Poiss. 



xiv. p. 397 (1839); Giinth. Cat. Fish. v. p. 69 (1864), and Petherick's Trav. 



ii. p. 227 (1869); Bouleng. Fish. Nile, p. 324, pi. Ivii. (1907). 

 Bagara Bacbika, Rifaud, Voy. Egypte, pi cxciv. (1830). 



Depth of body 4^ to 5f times in total length, length of head 3j to 

 4 times. Head much depressed, If to If times as long as broad, smooth 

 above or finely striated on sides of elongate fontanelle ; occipital process 

 long and narrow, in contact with first interneural bone (which is hidden 

 under the skin); snout broadly rounded or truncate, projecting beyond 

 lower jaw, If (young) to 3f times as long as eye, which is 4J (young) 

 to 11 times in length of head and 1 1 to 8| times in interocular width; 

 width of mouth 2\ to 2f times in length of head ; prajtnaxillary band 

 of teeth 6 or 7 times as long as broad, a little shorter than and about as 

 broad as or a little narrower than the band of vomerine teeth. Nasal 

 barbel \ (adult) to f length of head ; maxillary barbel 2 (adult) to 3^ 

 tunes length of head, reaching extremity of ventral or anal in the adult, 

 caudal peduncle or caudal fin in the young ; outer mandibular barbel 

 1^ to 2 times length of inner, and f to f length of head. Gill-rakers 



