SYNODONTIS. 305 



tl Movable niaihlihulur teetli ',\0-?)'i ; iiiaxill;irv l)aibel lunger 

 than head. 

 Hnineral process keeled, sharply pointed ; skin 



villose on sides 30. S. (h'/xunci, ]?l<;r., p. i'Mi. 



Humeral jirocess feebly keeled, obtusely pointed; 



skin smooth ?>i. S. tliolloni, IM^v., y). 4:?>0. 



Humeral ])rocess not keeled, sharply pointed ; 



skin smooth ;52. S. anijclicKs, Schilth., p. 440. 



XIX Movable mandibular teeth 15-20 ; maxillary bai bcl not or 

 but slightly longer than head. 

 Humeral |)rocess much longer than bi'oad ; 

 snout twice as long as postocular part of" 



head ;',;5. .S'. co'H'/*'/;, Pellegr., p. 411. 



Humeral process little longer than broad ; 

 snout not twice as long as postocular {)art 

 of head :U. 6'.i/'an/a//.s Blgr., p. 412. 



tt Maxillary barbel very distinctly margined at base. 

 Movable mandibular teeth 20-2G ; adipose 



dorsal shorter than head 35. /S. ornatipinnis, Blgr., p. 414. 



Movable mandibular teeth 18-20 ; adipose 



dorsal longer than head 3G. ^S'. w/rwu', IMgr., p. 44.'>. 



/3. Maxillary barbel i to | length of head ; snout much longer than 

 postocular part of head. 

 * Movable mandil)ular teeth 24-30. 

 8nout 2i times postocular part of head, acutely 

 j)ointed ; adipose dorsal a little shorter 

 than its distance from rayed dorsal : 



maxillary barbel | length of head . . . 37. S. <jiitlafi(s, Glhr., [t. 447. 

 Snout 2 times postocular part of head, obtusely 

 ])ointed ; adipose dorsal as long as its 

 distance from rayed dorsal ; maxilhuy 

 barbel ^ length of head ;>8. .S'. loiujlrDst/m, Blgr., p. 448. 



** Movable mandilnilar teeth less than 10. 



Snout 2 times postocular part of head, termi- 

 nating in a globular swelling ; adipose 

 dorsal nearly twice as long as its distance 

 from rayed dorsal; maxillary barbel f 

 length of head ;5'J. .S'. /((Aro, (Jtlir.. ].. 4 ID. 



Snout 1^ times postocular part of head, termi- 

 nating in a spatulate expansion ; adipose 

 dorsal much shorter than its distance 

 f>"om rayed dorsal ; maxillarv barbel j 

 length of head 10. 6. n/?7/,//,//^ Blgr.. p. 450. 



