Introduction. Ixiii 



bbb. Ventral fins wholly wanting, pectorals us- page 



ually present, 

 v. Snout not tubular with the small mouth at its 

 end; body not covered with bony plates, 

 eel-shaped, 

 w. Gill openings lateral and vertical; snout 

 conic, the jaws not very heavy; gape longi- 

 tudinal; lips thick; lower jaw projecting; 

 teeth in cardiform bands on jaws and 



vomer Anguillidce 90 



ww. Gill openings horizontal, inferior, very 

 close together, apparently confluent ; pos- 

 terior nostrils in front of eye Symbranchidce 89 



vv. Snout tubular, bearing the small mouth at 

 its end; body angular, covered with bony 

 plates, not truly eel-shaped Syngnathidoe 162 



