on 16 of kl control panels, as traces to light or moderate growths 

 on 5, and heavy on one of the same numher of teat panels. 



"b. Bryozoa (encrusting ). Two colonies of Electra 

 crustulenta occurred on a single test panel. 



c. Arthropoda (crustaceans ) ♦ Balanus (hamacles) occurred 

 on 9 of Ul control panels and on 3^ of the same numher of test panels. 

 Two of the control panels were each 50^ covered, and. 7 of the teat 

 panels were from 70^ to 100^ covered. The maocimum diameter attained 



on the control panels was 8 mm, while that on the .test panels was 

 19 mm. Amphipods ( Corophium ) appeared on only the first of the control 

 panels, on which they were numerous. A few Corophium appeared on 2 

 of the teat panels. 



d, Choraata (tunlcatea ) . Tunicates occurred on the 

 first 2 of the control panels and on 11 of the kl test panels, 

 ranging in num'ber from a few to numerous. Botryllus schloaserl 

 and Molgula occurred most frequently. 



All. 05 Sxmnnary and Conclusions 



1. Installation . A test "board of the panel type installed 

 at the Bayonne Annez of the Hew York Naval Shipyard, at Bayonne, 

 New Jersey, is still heing operated. The results of this test have 

 heen aummarized to the end of 19^7 • 



2. Teat Eesults . 



a. Borers. No evidence of Teredinidae was recorded at 

 this location, and LlTrmoria occurred only as "bare traces on the 

 test panels during the latter half of 19^+5 and of 19^7* 



Id. Fouling Organisms . Silt and invertebrate animals 

 belonging to h phyla contributed to fouling of the panels. The 

 invertehrates were comprised of hydroids, encrusting Bryozoa, 'bamaclea 

 and amphipods, and tunicates. The hydroids and hajmacles occurred 

 with the greatest fre<iuency, while the occurrence of the other 

 organisms was merely sporadic. 



3. Recent Addenda . Both Teredinidae and Limn or i a appeared 

 as traces at this station in 19^8 and 19^9' 



57 



