very 'heavy in those panels suhmerged for 7 and 8 months. With the exception 

 of occasional panels in which the attack was lighter, their attack continued 

 very heavy until the termination of the test. In several cases the panels 

 were riddled and some were nearly destroyed. Chelura were numerous 

 along with Limnoria in 19^5 and 19k6. 



3' Pholadldae . No Fholadidae were recorded at this J.ocatlon. 



A2^.0k Jouling Afients 



1. Silt . Deposits of silt, ranging from traces to light or same- 

 times moderate, occiirred on all the panels, "both control and test. 



2. Algae . Traces to moderate growths of algae occurred on 5 of the 



51 control panels and on 12 of the 55 teet panels. The algae recorded were 

 mostly green, sometimes red. 



5. Invertebrate aniTnn,1 phyla . 



a. Porifera (sponges ). Traces of enc3rusting sponges occurred 

 on a single control panel and on 5 of the 55 test panels. 



h. Coelenterata (hydroids ). Hydroids, ranging from traces to 

 occasionally light growths, occurred on 25 of the 51 control panels and on 



52 of the 55 test panels. Tutularia was the only form identified. 



c. Bryozoa (encrusting and filamentous ). Encrusting Bryozoa 

 occurred more or less ahundantly on 29 of the 51 control panels and on 28 

 of the 55 test panels. Cryptosula pallasiana , Cryptosula sp. , 

 Qemelliporidra aculeata , Schizoporella unicornis , Schizoporella sp., and 

 Waters ipora cucullata were identified. Filamentous Bryozoa occurred on 



5 of the 51 control panels and on 2 of the 55 test panels. Bugula 

 f labellata , B. neritlna, and B. sp. were identified. 



d. Annelida (annelid worms ). A few serpulid ( Serpula ) worms 

 were found on 2 control, pemels. 



e. Arthropoda (crustaceans ). Beilanus (harnacles) occurred on 

 25 of the 51 control panels, ranging from a few to an ahimdance, and on 25 

 of the 55 test panels. On the test panels, they occurred regularly from the 

 start of the test on July 1, 19iU4- until Octoher 25, 19^5, and also on the 

 last k test panels, hut only intermittently on those panels in "between. 



On the control panels, the maximum diameter recorded was 12 mm on one panel 

 Buhmerged during Decemher 19l<-ii-. The first control panel suhmerged during 

 July 19^ was the only one that was covered. On the test panels, the 

 TnftXJTnuTn diameter recroded was 25 mm on one panel submerged during July, 

 August, Septemher, and Octoher in I9I1U. Only the first 5 test psinels 



117 



