Table I 



Fouling organisms observed and periods of attachment 

 at the fouling test site 



Organism 



Barnacles 



( Balanus improvisus ) 

 Simple Hydroids 



(probably Thuiaria ) 

 Colonial Hydroids 



(probably Sertularia ) 

 Colonial Hydroids 



(probably Tubularia ) 

 Calcareous Tubeworms 



(Serpulidae) 

 Encrusting Colonial Bryozoans 



(probably Acanthodesia ) 

 Erect Bryozoans 



(probably Bugula) 

 Jingle Shells 



( Anomia simplex ) 

 Colonial Tunic ate s 



(probably Perophora) 

 Solitary Tunicate s 



(probably Molgula) 

 Oysters 



( Crassostrea virginica ) 

 Mussels 



(Mytilus) 

 Anemones 

 Slipper Limpet 

 Snails 



Encrusting Sponges 

 Clams 

 Mud Crabs 

 Flatworms 

 Amphipods 



(Caprella) 



Period of Attachment 



April to November 

 April to August 

 July to September 

 July to September 

 June to October 

 April to November 



July to November 



Autumn 



Autumn 



July to September 



minor occurrence 

 attachment slight 

 minor occurrence 

 attachment slight 

 minor occurrence 

 attachment slight 

 minor occurrence 

 minor occurrence 



minor occurrence 



24 



