232 SILURID^E. 



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

 light edge. 



Total length 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. Badgett, 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. o£ 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., Giinth, & Playf. Fish. Zanzib. p. 113 (1866). 

 Clarias mossambicus, Fischer, Jahrb. Hamb. Wiss. Anst. i. 1 884, 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) ; Pellegr. 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.; Boule.g. Poiss. Bass. Congo, p. 253 (1901), and Fish. Nile, 



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

 Clarias lazera (non Cuv. & Val.), Giinth. 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 microphthalmus, 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, 3J to 5| 

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

 occipital process ; eye 2| (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 

 crescentic band with or without a short posterior median process, this 

 band 1 to 1^ times the width of the prsemaxillary band; nasal barbel 

 ^ to f length of head (^ to § in the very young) ; maxillary barbel § to 



