e. Arthropoda (cmstaceana ) . Balanua ('barriacleB ) occurred 

 more or less aljundantly on only 5 of the 22 control panels and on all 

 the test panels that were removed "before Octo'ber 20, 19^5^ hut only 



as minute traces on 2 of the 7 test panels removed thereafter, although 

 these panels had "been suhmerged for 8 months. Seven test panels suh- 

 merged from 5 "to 8 months were from kO^ to 93i' covered. The maximum 

 diameter recorded on any of the control panels was 6 mm, while on the 

 test panels, a mn.y1nium diameter of I6 ram was recorded on a panel suh- 

 merged for 8 months. 



f. Mollusca (nonhorlng mollusks ). A trace of Anemia 

 (jingle-shells) was recorded on 3 control panels and on only a. single 

 one of the test panels. A single specimen of the family Pterldldae 

 was also found on one of the test panels. 



g. Chordata (tunicates ). Tunlcates were recorded on 

 2 control panels and on 2 test panels. They occurred as mere 

 traces except on one of the test panels, which was 10^ covered. In 

 two cases the organism was identified as Botryllus schlosserl . 



A5^.05 Sximmary and Conclusions 



1. Install ation . A test hosird of the panel type was operated 

 at the U. S. Kaval Advanced Base at Noumea, New Caledonia, from July 

 19, I9H until its discontinuance after May 28, 19^6, to determine the 

 identity and prevalence of marine "borers and fouling organisms occurring 

 at this location. 



2. Test Besults . 



a. Borers . Teredinidae occu3?red rather sporadically, and 

 the attack appeared to rate only as moderate. The "breeding season extended 

 from the middle of July to the middle of March. Llmnorla , however, 

 were very ahundant and very destructive, and the attack rated as very 

 heavy in "both 19^5 and 19*1-6. No Pholads were recorded at this location. 



"b. Fouling Organisms . Silt and inverte'brate animals 

 "belonging to 7 phyla contri"buted to. fouling of the panels. The 

 phyla coniprlsed encrusting sponges, hydroids, encrusting and filamentous 

 Bryozoa, serpulid worms, "barnacles, jingle-shells, and timicates. The 

 hydroids, encrusting Bryozoa, serpulid worms, and "barnacles all occtirred 

 with great frequency, the encrusting sponges with less frequency, while the 

 occurrence of the other organisms was purely sporadic or occasional. 



252 



