Tj. Fouling Organisms . Silt, algae, and Inverte'brate animals 

 "belonging to 7 phyla contributed to fouling of the panels. The latter 

 included sponges, hydroids, encrusting and filamentous Bryozoa, marine 

 voiTDB, "barnacles. Jingle-shells, oysters, and tunicates. Of these 

 organisms, the hydroids and hamacles occurred with the greatest frequency, 

 f ileuaentous Bryozoa and serpulid worms occurred with less frequency, while 

 the occurrence of the others was merely sporadic or occasional. Algae 

 occurred on a siiigle test panel. 



5. Eecent Addenda . The Teredinidae attack was rer^ heavy at this 

 station in 19^8 and 19^9, while that "by Llmnoria was rated as slight in 

 1948 and as moderate the following year. 



122 



