5« Sphaeroma . Two specimens of Sphaeroma were observed on a 

 single test panel in 19^6. 



h. Pholadidae . No Pholadidae were recorded at this location. 



A22.0i|- Fouling; Agents 



1. Silt . Silt occurred on all the panels of "both the control and 

 test series. The deposits, which were mostly clay, ranged from traces to 

 moderate on the control panels and from traces to heavy on the test panels. 



2. Algae . Algae occurred on a single control panel and on 9 of 

 the 26 test panels, the growths ranging from traces to light, even to 

 moderate in one case. Green algae occurred most frequently, tut trown 

 and red algae also were ohserved. 



5* Inyertehrate animal phyla . 



a. Coelenterata (hydroids ) . Hydroids occurred on k of the 19 

 control panels and on 15 of the 26 test panels, the groirths rating as 

 traces on the control panels and from traces to moderate on the test panels. 

 No hydroids were identified. 



h. Bryozoa (encrusting and filamentous ) . Encrusting Bryozoa 

 occurred on k of the 19 control panels and on ik of the 26 test panels. 

 Schizoporella unicornis was identified on a single test panel. Filamentous 

 Bryozoa occurred on h of the 19 control panels and on 8 of the 26 test 

 panels. No forms were identified. 



c. Annelida (m a rine worms ) . Serpulid ( Serpvila ) tuhes occurred 

 on 2 of the 19 control panels and on l6 of the 26 test panels. No lengths 

 were recorded. Five of the test panels were from 25^ to 50?^ covered. 



d. Airthropoda (crustaceans ). Balanus (barnacles) occurred 

 on a single control panel and on 5 of the 26 test panels. The harnaclea 

 on the control panels were juvenile, and 7 mgi was the maximum diameter 

 recorded on the test panels after "both 2 aaid 6 months' suTimergence, 

 respectively. Two hxuidred and fifty amphipods were recorded on a single 

 control pajiel, and the presence of Corophium was noted on a single test 

 pajiel . 



e. Mollusca (nonhoring mollusks ). Miscellajieous nonhoring 

 mollusks occiurred occasionally as follows: Four Juvenile specimens of 

 Anomia (jingle-shells) occurred on a single control panel; a trace of 

 juvenile Avicula occurred on 2 of the test panels; eind 5 specimens of 

 Oatrea (oysters) up to 50 una in diameter occurred on a single test panel. 



106 



