5. Hgr. 





J! 



G. Skel. 





?? 



7. Ad. 





Nile at Cairo. 



8. Hgr. 





Pond near Bedushen, S. of Cairo 



9-10, 11. 



Yg. 



Near Cairo. 



12. Skull. 





Picked up at Demare, Libyan 

 Desert. 



13-10. Yg. 





Near Luxor. 



17-23. Yg. 





Between Luxor and Assuan. 



24-27. Hgr 



■ & yg- 



Assuan. 



28. Hgr. 





Khartum. 



20. Hgr. 





Faslioda. 



30. Skull. 





L. Victoria. 



31. Hgr. 





Kano, Hadeija R., Chad Basin. 



228 SILURIDiE. 



1, 2-3. Yg. Freshwater pool near Ghet-el- L. Loat, Esq. (C). 



Nassara, L. Menzaleh. 

 4. Hgr. (Type of Nile. Dr. Riippell (C). 



C. parcimanus.^) 



J. Petherick, Esq. (C). 



L. Loat, Esq. (C). 



>•> 



Capt. S. Flower (P.). 

 L. Loat, Esq. (P.). 



J. Petherick, Esq. (C). 

 L. Loat, Esq. (C). 

 Mr. E. Degen (C). 

 Capt. G.B. Gosling (P.). 



2. CLARIAS GARIEPINUS. 



Silurus (Heterohranehus) gariepinus, Burchell, Trav. Int. S. A£r. i. p. 425, fig. 



(1822). 

 Clarias capensis (non C. & V.), A. Smith, 111. Zool. S. Afr., Pise. pi. xxvii. (1845). 

 Clarias mossambicus, part., Peters, Mon. Berl. Ac. 1852, p. 682, and Reise 



Mossamb. iv. p. 32, pi. vi. figs. 1 & 2, and pi. vii. figs. 2 & 3 (1868). 

 Clarias gariepinus, Giinth. Cat. Fish. v. p. 14 (1864) ; M. Weber, Zool. Jahrb., 



Syst. x. 1897, p. 149 ; Bouleng. Poiss. Bass. Congo, p. 254 (1901), and Proc. 



Zool. Soc. 1907, p. 1069. 



Depth of body 6 to 7 times in total length, length of head 3 to 3| times. 

 Head If to If times as long as broad, its upper surface more or less 

 distinctly granulate in the adult ; occipital process angular ; frontal 

 fontanelle 3 to 3^ times as long as broad, 3^ to 4 times in length of head ; 

 occipital fontanelle very small, in advance of occipital process ; eye very 

 small, 3 to 4 times in length of snout and 5 to 7 times in interorbital 

 width in the adult ; width of mouth nearly equal to interorbital width, | 

 length of head ; band of prsemaxillary teeth 4 (young) to 7 times as long 

 as broad ; vomerine teeth mostly conical, or granular-subconical, forming 

 a crescentic band, Avhich may be slightly interrupted in the middle, 

 where it is nearly as broad as or narrower than praemaxillary band ; nasal 

 barbel i to f length of head (f in young) ; maxillary barbel shorter 

 than head in adult (a little longer in young), reaching base or second 



