2. Test Besiats . 



a. Borers . Teredlnldae were extremely active and destructive 

 throxigliout the period of the test, occiarring in every pemel, "both control 

 and test, at each of the foxir locations, with the "breeding season 

 extending throughout the year. Test panels at each location were riddled 

 when Buhmerged for as brief a period as 5 months. The attack rated 

 very heavy at all four locations. Llmnoria also were active throughout 

 the period of the test, occurring in all the panels, "both control and 

 test, at locations 5 sxi6. k and in nearly all of "both types at the other 

 two locations. The maximum attack rated medium heavy at locations 1 and 2 

 ajid heavy at the other two locations. No Pholadis were recorded at any 

 of these locations. 



"b. Fouling Orfcanisms . Silt, green algae, and inverte"brate 

 anijuals "belonging to 6 phyla contrihuted to fouling of the panels. The 

 phyla were encrusting sponges, hydroids, encrusting and filamentous 

 Bryozoa, annelid worms, nonhoring mollusks, and tunicates. Silt 

 occurred on all the panels, "both control and test, at each of the four 

 locations, ^droids and enc3rusting Bryozoa occiurred qtiite frequently 

 at all four locations and green algae somewhat less frequently. Serpulid 

 worms occurred quite often at locations 1, 2, and 5 "but were scarce 

 at the other location. The filamentous Bryozoa occurred sporadically 

 at locations 1 and 2 hut not at all at the others. The occurrence 

 of the other organisms was largely occasional. 



2^9 



