from 8 to 4 months, rated very heavy each year. Llmnoria showed some 

 evidence of activity throughout much of the period covered hy the test 

 "but never occurred in more than trace nimbers . 



h. Fouling Organisms . Silt, algae, and invertebrate animals 

 belonging to 6 phyla contributed to fouling of the panels. The latter 

 coniprised hydroids, encrusting emd filamentous Bryozoa, serpulid tubes, 

 barnacles and ang)hipods, miscellaneous nonboring mollusks, and tunicates. 

 Of these organisms, hydroids, encrusting and filamentous Bryozoa, and 

 barnacles occurred with the greatest frequency; serpulid tubes, mussels, 

 and scallops occurred with somevhat less frequency; while the occurrence 

 of the others, as well as of the algae, was purely sporadic. 



3. Recent Add end, a . The attack by Teredinidae sets was moderate 

 in 19^*5 and very heavy in 19^9 on Test Board USNTI-l. The Llmnoria 

 attack was slight here both years. A board installed near Paint Shop 

 Wo. 1 indicated a heavy attack by Teredinidae in 19^+8 but only slight in 

 the following year. Limnoria were medium heavy here both years. A 

 third board, installed near the south end of the Finger Pier on 1 

 September 19^9, showed no evidence of Teredinidae to the end of that 

 year and only a slight attack by Limnoria . 



20^^ 



