978 
Body very slender, worm like, depth 30 to 100, tail 
much shorter than body. Mouth small, week. Teeth feeble, 
acute, very small, usually unlserial, sometimes irregularly 
blserial on vomer. Gill openings small. Vertical fins 
usually rudimentary or covered by skin, often may form short 
fold around end of tail. Sometimes dorsal and anal may 
protrude higher with rays visible anteriorly and posteriorly 
with mere low fold of skin in middle. 
