Life Beneath the Waves. 31 



antennse appeared first, in the same order 

 in which they had disappeared; and as they 

 issued from the tube, closely followed by 

 the beautiful plumes, with a jerking move- 

 ment they righted themselves side by 

 side. Upon looking down the tube when 

 closed, I could only perceive one of the 

 stoppers, and as it fitted exactly into the 

 tube, the natural conclusion is, that the 

 two " terminal cones' 7 act like two doors, 

 thereby rendering the inmate of the shell 

 doubly safe from injury. The shape of 

 these little stoppers is not always the 

 same, for some are pointed at the top, and 

 bear a resemblance in shape to a tiny 

 mushroom. The colour of these Serpuke is 

 generally brown, drab, or black. 



One of the principal differences between 

 Serpula3 and Sabella? is, that although the 

 feathery plumes of the latter are more 



