MARINE BIOLOGICAL STATION AT PORT ERIN. 



88 



figure (IX., 8). Serpula makes larger white calcareous 

 tubes, and is frequently seen in our tanks. These are 

 only a few of the very many kinds of bristle-bearing 

 marine worms or Annelids (for a full list see the report 

 in our " Fauna," by Mr. J. Hornell). Other common 

 species are the fisherman's lug-worm, Arenicola marina, 



Fig. IX. 



and the sea-mouse, Aphrodite acuhata, both found 

 burrowing in sand. These and various other kinds are 

 generally to be seen in the shallow table tanks of the 

 Aquarium. Some of the Sedentary Annelids inhabit 

 tubes made of sand grains, and one of the members of the 



