ranged generally from traces to light (rarely) on the control panels, 

 and from traces to light, or moderate, (rarely) on the test panels, 

 peurticularly at the last location. Tuhularia was the only specimen 

 identified. Metrldlum. a member of another group of Coelenterata , 

 occurred on 2 of the test panels at the Ferry Slip at the Naval Air 

 Station. 



c. Bryozoa (encrusting and filamentous ). Encrusting Bryozoa 

 occurred more or less abundantly on the pemels at all three locations. 

 They were found on 10 of the hi control panels- and 15 of the k-J test 

 panels at the Ferry Slip at the Naval Air Station, on 11 of the kl 

 control psuiels and 23 of the kf test panels at the Ferry Slip, at 

 Pensacola, and on 8 of the kO control panels £ind 1? of the ^7 test 

 panels at the Eailroad Trestle at the Naval Air Station. At the first- 

 named location, 7 of the test panels were from 25^ to 80^ covered, 



and at the second location, 9 of the test panels were from 10^ to 

 90^ covered . Cryptosula p alias i ana , Electra sp . , Gemelliporidra 

 magniporosa , and Schizoporella unicornis were identified. Filamentous 

 Bryozoa occurred on 5 of the kl control panels and on l6 of the ^7 test 

 panels at the Ferry Slip at the Naval Air Station. Bugula flahellata , B. 

 neritina , and B. sp . were identified . 



d. Annelida (annelid worms ). Serpulid ( Serpula ) tuhes 

 occurred on 8 of the kl control panels and 29 of the 1*7 test panels 

 at the Ferry Slip at the Naval Air Station, on 7 of the kl control 

 panels and ik of the hj test panels at the Ferry Slip at Pensacola, ana 

 on 2 of -Oie kO control panels and 15 of the kf test panels at the 

 Railroad Trestle at the Naval Air Station. 



e. Arthropoda (crustaceans ) . Barnacles occurred with 

 great frequency on the panels at all three locations and in considerable 

 fthundance at the last two locations. At the Ferry Slip at the Naval Air 

 Station, they were found on 25 of the kl control panels and on kl of 

 the kf test peuiels, on 33 of the kl control panels and. 46 test panels 



at the Ferry Slip at Pensacola, and on 31 of the kO control panels and 

 lt-5 of the kj test panels at the Bailroad Trestle at the Naval Air Station. 

 On the control panels, maximum diameters of 9* 8, emd 11 mm were 

 recorded at the respective locations in the order in which they are 

 listed. On the test panels maximum diameters of 15> 21, and 27 mm 

 were attained in k, 6, and 8 months, respectively. At the Ferry Slip 

 at Pensacola, l** of the control panels were from 10^ to 100^ covered, 

 ■and 36 of the test panels were from 5^ to 100^ covered. At the 

 Eailroad Trestle at the Naval Air Station, Ik of the control panels 

 were from 25^ to 100^ covered, and 2k of the test panels were from 

 5^ to 100^ covered. , 



95 



