232 SILURID.E. 



with or without darker spots or marblings, white beneath ; anal with a 

 light edge. 



Total len°th 850 millim. 



Senegal, Gambia, Niger. Type (in Paris Mus.), stuffed, examined. 



1-2. Ad. St. Louis, Senegal. M. P. Delhez (C). 



3-7. Hgr. & yg. Kaedi, „ „ 



8-10. Types of Gambia. J. S. Budgett, Esq. (P.). 

 C. budgetti. 



11. Ad. Niger. Mr. J. T. Dalton (C). 



12-13. Ad. „ W. A. Forbes, Esq. (P.). 



14. Yg. Benue R., N. of Ibi. H. L. Norton Traill, Esq. (C.). 



5. OLARIAS MOSSAMBICUS. 

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



Mossamb. iv. p. 32, pi. vi. fig. 3 (1868). 

 Clarias gariepinus, part., Gtinth, & Playf. Fish. Zanzib. p. 113 (1866). 

 Clarias mossambicus, Fischer, Jahrb. Hamb. Wiss. Anst. i. 1884, p. 28 ; Vincig. 



Ann. Mus. Genova, (2) xv. 1895, p. 31, fig. 1, and xvii. 1896, p. 25 ; Pfeff. 



Thierw. O.-Afr., Fische, p. 27, fig. (1896) ; Pellogr. Mem. Soc. Zool. France, 



xvii. 1905, p. 176 ; Bouleng. Proc. Zool. Soc. 1907, p. 1071. 

 Clarias robecchii, Vincig. Ann. Mus. Genova, (2) xiii. 1893, p. 450, and xv. 1895, 



p. 30, fig. ; Bouleng. Poiss. Bass. Congo, p. 253 (1901), and Fish. Nile, 



p. 285, pi. li. fig. 1 (1907). 

 Clarias lazera (non Cuv. & Val.), Griinth. Proc. Zool. Soc. 1894, p. 89 ; Bouleng. 



Proc. Zool. Soc. 1901, ii. p. 161. 

 Clarias smithii, Giinth. Proc. Zool. Soc. 1896, p. 219, fig. 

 Clarias microplitlialmus, Pfeff. op. cit. p. 28 ; Hilgend. Zool. Jahrb., Syst. xxii. 



1905, p. 410. 

 Clarias giintheri, Pfeff. 1. c. 



Depth of body 6 to 8 times in total length, length of head 3 to 3§ 

 times. Head 1^ to 1§ times as long as broad, its upper surface coarsely 

 granulate in the adult ; occipital process angular ; frontal fontanelle 

 sole-shaped or knife-shaped, 2^ to 4 times as long as broad, 3| to 5J 

 times in length of head; occipital fontanelle small, in advance of 

 occipital process ; eye 1\ (young) to 4 times in length of the snout, 

 4 (young) to 8 times in interorbital width ; width of mouth equal to or 

 a little less than interorbital width ; band of prsemaxillary teeth 4 (young) 

 to 8 times as long as broad ; vomerine teeth granular, forming a 

 ci - escentic band with or without a short posterior median process, this 

 band 1 to ~\\ times the width of the preemaxillary band; nasal barbel 

 j to § length of head (g to § in the very young) ; maxillary barbel § to 



