541 
d 2 . Snout long, its fleshy tip projecting sharply 
beyond premaxillary teeth; teeth in jaws 
fine, close set, form narrow bands, on vomer 
largely molar like, form broad patch. 
e L . Rhynchocymba. Premaxillary patch of teeth 
■ ii rn w y- in » ■ mm —n «■ •» 
much smaller than vomering patch and sep¬ 
arated by widely confluent anterior ends 
of maxillary bands; anteroventral line of 
snout occupied by deep pocket; no enlarg¬ 
ed pores between nostrils; hind nostril 
horizontal slit with entire rim. 
nystromi_^ 
e 2 . Rhynehoconger. Premaxillary patch of teeth 
longer than vomerine patch, in full con¬ 
tact, front ends of maxillary bands thus 
widely separated; anteoventral line of 
snout occupied by fleshy keel ending post¬ 
eriorly in small free process; pair of en¬ 
larged pores between nostrils; hind nost¬ 
ril widely open, m r ith fimbriate border. 
ectenurus. 
