C'LAKOTES. 343 



than interocular width ; prseinaxillary band of teeth 5 to 7 times as long 

 as broad ; vomero-pterygoid teeth forming a narrow band, often 

 narrowly interrupted in the middle, sometimes also on the sides. Nasal 

 barbel | to f length of head ; maxillary barbel flattened, band-like 

 at base, nearly 1 to If- times length of head ; outer mandibular barbel 

 If to If times as long as inner, .V to nearly once length of head. Gill- 

 rakers rather long, 16-22 on lower part of anterior arch. Humeral 

 process short, acutely pointed, granulate. Dorsal I 6 ; spine strong, 

 feebly serrated behind in the young, with granulations in front in the 

 adult, | to f length of head; first soft ray longer, but always shorter 

 than head. Second dorsal short, deeper than long, its distance from 

 the first about twice as great as basal length of latter; the rays not 

 distinct in specimens under 100 millim. total length, the strong anterior 

 spine fully ossified in specimens over 400 millim. Anal 12-14, 7 or 8 

 rays branched. Pectoral much shorter than head, not reaching ventral, 

 with a strong spine bearing 5 (young) to 18 seme on inner side ; these 

 seme much stronger in proportion in young than in adult, which have 

 a fine serration on outer edge. Ventral much nearer root of caudal than 

 end of snout. Caudal deeply forked, lobes acutely pointed in young, more 

 obtusely, or even rounded, in adult. Caudal peduncle as long as deep 

 or a little longer than deep. Tubes of lateral line strongly branched. 

 Brown above, silvery white below ; a blackish spot above the humeral 

 process ; a brown or blackish band on each lobe of the caudal fin. 



Total length 570 millim. ; grows to 800. 



Upper Nile, Blue Nile, White Nile, Bahr-el-Gebel, Webi Shebeli, 

 Tana and Gana (East Africa), Chad Basin, Senegal, Niger. — Type in 

 Senckenberg Museum, Frankfort/M. 



L. Iioat, Esq. (C). 



J. Petherick, Esq. (('.). 



L. Loaf, Esq. (C). 



Capt. S. Flower (P.). 

 L. Loiit, Esq. (€.). 



1. Yg. 







Between Luxor and Assuan. 



2, 3, 4-5. 



AJ. 



& yg. 



Khartum. 



6. Hgr. 







Omdurman. 



7, 8. Yg. 







Wad Medine, Blue Nile. 



9. Yg. 







RosaireSj Blue Nile. 



10. Yg. 







Mangara, White Nile. 



11. Yg. 







Kawa, ,, 



12. Skel. 







') )5 



13-14. Yg. 







Nur-ed-Dain, White Nile. 



15-21. Hg, 



■• & 



yg- 



Goz abu Guinah, White Nile. 



22. Ad. 







Jebelain, ,, 



26. Ad. 







Grharb-el-Aish, ,, 



24-26. Yg. 







Fashoda, „ 



