"b. Fouling Organlsmfl . Silt and invertebrate am' mala "belong- 

 ing to 6 phyla conti'lbuted to the foiiling of the panels. The latter com- 

 jfl?ised hydroids, encrusting Bryozoa, annelid worms, barnacles, m.ussels, 

 and tunicates. Of these organisms, the hydroids occvtrred most frequently. 



The 5 -month period the test board was in operation was entirely 

 too short for conclusive results. However, the general trend at this 

 location is clearly indicated. 



27 



