394 SILUKID.E. 



Pectonil spine strongly sernited on both sides ; 

 ii(Ii|)Ose dorsal not longer than its distance 



from rayed dorsal ; spine of dorsal ahoiit i [p. 425. 



length of head 20. -S'. )nnr)noratiis, LJinnh., 



jn+ Movable mantlibular teeth 45 to 54 ; base of adipose 

 dorsal Ig^ to 21 times its distance from rayed dorsal ; 

 pectoral s[)ine strongly serrated on both sides. 

 Humeral ])rocess much longer than broad ; 



skin villose on sides 21. *S'. afro-fiseheri, Hilg., ]). 425. 



liumei'al ()rocess not longer than broad . . . 22. S. fuellehorni, Hilg. & 



[l*appenli., p. 427. 



ft Maxillary barbel strongly margined at the base, the marginal 

 membrane at least nearly as broad as the barbel. 

 X Movable mandibular teetli 45 to 50. 

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



Xt jMovable mandibular teeth 30 to 43. 

 Pectoral spine feebly serrated on outer side ; 



atlipose dorsal not more than twice as long 



as its distance from rayed dorsal .... 24, S. ni<irita, V. & V., p. 429. 

 Pectoral spine strongly serrated on both sides ; 



adipose dorsal o times as long as its 



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



+ + + Moval)le mandibular teeth 15-28. 

 Humeral process not much longer than broad ; 



adipose dorsal lA times as long as its 



distance from rayed dorsal ; maxillary 



barbel \ length of head 2(). S. inacrosthjma, Blgr., }>. 432. 



Humeral process longer than l)road ; eye at 



least twice in interorl)itaI width ; adipose 



dorsal H to 2^ times as long as its distance 



from rayed dorsal ; maxillary barbel 1'; 



to l.l length of head 27. S. obesu.^, Blgr., }). 433. 



Humeral process much longer tiian broad ; 



eye not twice in interorbital width ; 



adipose dorsal 2^ to 3^ times as long as 



its distance from rayed dorsal ; maxillary [[). 4;)5. 



barbel 1| to U length of head .... 28. S. rohh'iamus, 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 heail. 

 Skill villose on sides 21). 6'. hai'i/i, Pellegr., p. 4;'t(;. 



