€LASS X. ORDERII. 119 
ORDER 2. APODA. | 
Having no organs for locomation. 
SIPUNCULUs, (tube-worm,) body round, elon- 
gated ; mouth cylindric at the end, and narrower 
than the body ; aperture at the side of the bedy 
and veruciform. In the sea under stones, 
