394 SILUEID.E. 



Pectoral spine strongly serrated on both sides ; 

 adipose dorsal not longer than its distance 



from rayed dorsal ,• spine of dorsal about i |_P- 425. 



length of head 20. S. marmorahts, Lonnb., 



Xt+X Movable mandibular teeth 45 to 54 ; base of adipose 

 dorsal 1^ to 2J 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. 

 X Movable mandibular teeth 45 to 50. 

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



XX 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. riigrit'a, C. & 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. 



XXX 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 f length of head 2G. S. macrosiigma, 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 11 length of head • 27. S. obems, Blgnj p. '433. 



Humeral process much longer than broad ; 



eye not twice in interorbital width ; 



adipose dorsal 2£ to 3t> times as long as 



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



barbel 1\ to 1^ length of head . . . .28. S. robbianus, J. A. Smith, 



* Snout considerably longer than postocular part of head. 

 t Maxillary barbel not distinctly margined. 



X Movable mandibular teeth 50-55 ; maxillary barbel not 

 longer than head. 

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



