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TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Liverpool Committee, Mr. Arnold T. Watson, F.L.S., has 

 devoted much time and trouble to a careful study of the 

 methods in which these worms build up their very 

 beautiful houses by selecting and cementing together 

 particles taken from the surrounding sand and water. 

 The 6 little drawings on fig. X. are copied from the illus- 



Fig. X. 

 trations to one of Mr. Watson's scientific papers, and they 

 show the front end of the body and sandy tube of Terebella 

 conchilega, a common sedentary Annelid found in abund- 

 ance sticking out of the sand at low water near Port Erin 

 harbour. The middle figure in each row shows the head 

 of the worm placing and sticking together sand grains on 

 the top of its tube, like bricks on a wall. 



