Fig . 1 . Anne lid 



ANNELIDS (Worm Tubes) 



These organisms can be readily recognized by 

 their hard tubular shells (figs. 1 and 13), each 

 of which houses a living worm. Sometimes the 

 whole shell adheres firmly to the hull, but it 

 may rise from the surface and stand out at a 

 sharp angle. These tubes range in length from a 

 fraction of an inch to several inches, and may 

 form a large proportion of the fouling, especial- 

 ly on ships which have been stationed in the Ha- 

 waiian Islands or the southern Pacific. Some of 

 the commonest forms have the scientific name of 

 Hydroides» This should not be confused with Hy- 

 droids, the common name of an entirely different 

 group of animals. 



11 



