number of test panels at the Permanent Pier, on 26 of the 58 test panels 

 at the Marine Railway, on I5 of the 57 test panels at the Woody Island 

 Pier, and on 12 of the 16 test panels at the Army Pier. Two of the test 

 panels at the Permanent Pier were 20^ and 50^ covered, respectively, 

 after 11 months' suhmergence; one of the test panels at the Marine Rail- 

 way was lyjo covered after 5 months' suhmergencej two of the test panels 

 at the Army Pier were 10^ and 20^ covered, respectively, after 11 months' 

 suhmerger.ce . Crihilina sp . , Electra sp . , Hippothoa hyalina , Schizoporella 

 unicornis , and Tegella sp. were identified. Filamentous Bryozoa occurred 

 to a slight extent on the panels at four of the five locations. They 

 occurred on 6 of the 50 test panels at the Temporary Pier, on 2 of the 59 

 control panels and 8 of the 59 test panels at the Petrnianent Pier, on 2 of 

 the 57 test panels at the Woody Island Pier, and on 5 of the 16 test panels 

 at the Army Pier. Two 'of the test panels at the Permanent Pier were 

 "^Ojo and 50^ covered, respectively, after I5 months' submergence. Bugula 

 sp. was the only identification made. 



c . Annelida (annelid worms ) . Serpulld ( Serpula ) tubes 

 occurred more or less frequently on the test panels at all five loca- 

 tions, but appeared on only of the control panels. They occurred on a 

 single control panel and on h of the 5O test panels at the Temporary Pier, 

 on 7 of the 59 test panels at the Permanent Pier, on lU of the 58 test 

 panels at the Marine Railway, on 10 of the 57 test panels at the Woody 

 Island Pier, and on 9 of the I6 test panels at the krw Pier. They 

 occurred usually in small numbers, I60 being the maximum number recorded 

 on any one panel. 



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

 with great frequency on the panels at all five locations. They were 

 on 8 of the 50 control panels and 29 of the 50 test panels at the 

 Temporary Pier, on 12 of the 59 control panels and 57 of the same 

 number of test panels at the Permanent Pier, on 9 of the 28 control 

 panels and 5I of the 58 test panels at the Marine Eallvay, on k of 



the 57 control panels and 25 of the same number of test panels at the 

 Woody Island Pier, and on 6 of the I6 control panels and all of the 

 16 test panels at the Army Pier. The specimens on the control peinels 

 were mostly embryonic to Juvenile, but specimens up to 7 ™i were recorded. 

 On the test panels, maximum diameters of I5 nmi in 11 months, I9 mm in 11 

 months, 12 mp in 8 months, 17 mm In 11 months, and I5 mm in 6 months were 

 recorded for the respective locations in the order listed. At the Tenpo- 

 rary Pier, 22 of the test panels were from. 20^ to 100^ covered. At the 

 Permanent Pier, 5 of the control panels were from 20^ to 75^ covered, and 50 

 of the test panels were from 25^ to 100^ covered. At the Marine Railway, 

 5 of the control panels were from lOJo to IOO5& covered, and 18 of the test 

 panels were from 10^ to 100^ covered. At the Woody Island Pier, 15 of the 

 test panels were from 25^ to 100^ covered. At the Army Pier, 15 of the 

 test panels were from ^Ojo to 100^ covered. 



llt^9 



