394 SILUEIDJE. 



Pectoral spine strongly serrated on both sides ; 

 adipose dorsal not longer than its distance 



from rayed dorsal ; spine of dorsal about £ |.P- ^25. 



length of head 20. 6'. marmoratus, Liiiinb., 



tttt Movable mandibular teeth 45 to 54 ; base of adipose 

 dorsal 14. to 2^ times its distance from rayed dorsal ; 

 pectoral spine strongly serrated on both sides. 

 Humeral process much longer than broad ; 



skin villose on sides 21. S. afro-fischeri, Hilg., p. 425. 



Humeral process not longer than broad . . . 22. S. fuelleborni, Hilg. & 



[Pappenh., p. 427. 



ft Maxillary barbel strongly margined at the base, the marginal 

 membrane at least nearly as broad as the barbel. 

 J Movable mandibular teeth 45 to 50. 

 Anterior soft rays of dorsal much produced . 23. S. eupterus, Blgr., p. 427. 



t+ Movable mandibular teeth 30 to 43. 

 Pectoral spine feebly serrated on outer side ; 



adipose dorsal not more than twice as long 



as its distance from rayed dorsal . . . . 24. S. niijrita, 0. & V., p. 429. 

 Pectoral spine strongly serrated on both sides ; 



adipose dorsal 3 times as long as its 



distance from rayed dorsal 25. S. melanopterus, Blgr., p. 431. 



Jit Movable mandibular teeth 15-28. 

 Humeral process not much longer than broad ; 

 adipose dorsal 1^ times as long as its 

 distance from rayed dorsal ; maxillary 



barbel % length of head 20. S. macrostigma, Blgr., p. 432. 



Humeral process longer than broad ; eye at 

 least twice in interorbital width ; adipose 

 dorsal 1^ to 2\ times as long as its distance 

 from rayed dorsal ; maxillary barbel 1^ 



to 13, length of head 27. S. obesus, Blgr., p. 433. 



Humeral process much longer than broad ; 

 eye not twice in interorbital width ; 

 adipose dorsal 2\ to 3£ times as long as 



its distance from rayed dorsal ; maxillary [p. 435. 



barbel 14 to 14. length of head . . . . 28. S. rohbianus, J. A. Smith, 

 Snout considerably longer than postocular part of head, 

 t Maxillary barbel not distinctly margined. 



t Movable mandibular teeth 50-55 ; maxillary barbel not 

 longer than head. 

 Skin villose on sides 29. S. haiuji, Pellegr., p. 436. 



