t. Coelenterata (hydrolda and Metrldium ) . Hydrolds 

 occurred with great frequency on the panels at all three locations. 

 They were present on 17 of the 58 control panels and 58 of the ^5 test 

 panels at the Receiving Station Pier, on I6 of the 38 control panels 

 and k2 of the h^ test panels at Pier Wo. 1 (Fuel Oil Pier), and on 15 

 of the 56 control panels and 5^ of the hk test panels at Pier No. 8. 

 The gro^rths generally rated as traces on the panels of the control series 

 and from traces to light on the panels of the test series. Tuhularia 

 was identified at each location. A trace of Metridium occurred on a single 

 test panel at Pier No. 1 (Fuel Oil Pier) and on 2 of the control panels 

 and h of the test panels at Pier No. 8. 



c. Bryozoa (encrusting and filamentous ). Encrusting Bryozoa 

 occurred on one test panel at toth the Eeceiving Station Pier and Pier 

 No. 1 (Fuel Oil Pier) and on three test panels at Pier No. 8. Cryptosula 

 pallagiana was identified on one test panel at the last-named location. 

 Filamentous Bryozoa occurred more or less abvindantly on the panels at. 

 all three locations. They were present on 2 of the 58 control panels 



and 15 of the ^5 test panels' at the Receiving Station Pier, on 5 of the 38 

 control panels and 10 of the 45 test panels at Pier No. 1 (Fuel Oil Pier), 

 and on a single control panel and 10 of the Wj- test panels at Pier No. 8. 

 Bugula sp. was identified on a panel at the last-named location. 



d. Annelida (annelid worms ) . Traces of serpulid ( Serpula ) 

 tubes occurred on 5 test panels at the Receiving Station Pier and 



on four test panels at both Pier No. 1 (Fuel Oil Pier) and Pier No. 8. 



e. Arthropoda (crustaceaxis ). Balanus ("barnacles) occurred 

 with great frequency and in abundance on the panels at all three locations. 

 They appeared on 22 of the 58 control panels and on all k^ test panels 



at the Receiving^ Station Pier, on 21 of the 58 control peuiels and all 

 45 test panels at Pier No. 1 (Fuel Oil Pier), and on 15 of the 56 control 

 panels and all except one of the hk test panels at Pier No. 8. On the 

 control panels, maximum diameters of 10, 10, and 8 mm were recorded, and 

 on the test panels, maximum diameters of 20, 20, and I6 mm, in 8 to 9 

 months, were recorded for the respective locations in the above order. 

 Many tubular forms, which develop as a result of crowding, occurred at 

 each location. The maximum length of these forms was 50 mta. At the 

 Receiving Station Pier, 8 control panels were from ^0^ to 100^ covered, 

 and k2 test panels were from 60^ to 100^ covered. 



f. Mbllusca (nonboring mollusks ). %tilus (mussels) 

 occurred on ik of the 45 test panels at the Receiving Station Pier, on 

 a single control panel and 15 of the 45 test panels at Pier No. 1 (Fuiel 

 Oil Pier), and on a single control panel and 10 of the kk test panels at 

 Pier No. 8. The largest number occurring on any one test panel at these 



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