SILURID^. SILURIN^. 307 



Malapteriirus Lac. Dorsal fin adipose, placed close 

 to the caudal ; muzzle obtuse, turned upwards ; lower 

 jaw shortest ; caudal fin forked j anal fin very long. 



M. electricus. GeofF. Egypt. Bengalensis. Ind. Z, pi. 85. 2. 

 pi. 12. fig. 1. Cuvierii. lb. pi. 85. fig. 1. 



Pusichthys Sw. General shape and fins of Callichrus ; 

 head broad and obtuse ; mouth small, turned upwards, 

 the aperture vertical ; cirri very short ; tail forked. 

 P. uranoscopus. Riipp. Egypt, pi. 1. fig. 1. a.h. 



Plotosus Bl. Dorsal fin single or double, one of them 

 very long, extending the w^hole length of the back ; 

 caudal rounded ; cirri long. 



Clarias Gronov. Dorsal fin single ; caudal fin rounded, 

 distinct from the dorsal and anal ; vent almost central ; 

 eyes small. 



C. anguillaris iznw. Russ. Hamiltonii Sw. Ham. 146. 

 pi. 168. pi. 26. fig. 45. 



Plotosus Bl., Ham. Dorsal fins two ; caudal fin united 

 with the second dorsal and anal ; tail very long, eel- 

 shaped. 

 P. vittatus. Bl. 373. fig. 1. canius. Ham. 142. pi. 44. 



Platystacus Ham. (Bloch, pars.) Body short, de- 

 pressed, thick, as long as the tail ; fins as in Plotosus ; 

 the first dorsal with a serrated spine ; tail short ; head 

 very broad, truncate ; mouth excessively large ; under 

 jaw longest ; eyes minute, nearly vertical ; caudal fin 

 extending beneath to the base of the anal; jaws and 

 palate with minute sharp crowded teeth. 

 P. chaca. Ham. 140. pi. 28. fig. 43. 



Heterobranchus Geoff. Body anguilliform, resembling 

 Clarias ; dorsal fins two, both long ; the hinder adi- 

 pose ; branchia with ramified appendages. 



H. bidorsalis. GeofF. Egypt. Poiss. pi. 16. fig. 2. 



Cetopsis. Body oblong, round, thick ; tail short ; 

 dorsal fin single, placed near the head, between the 



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