A12.0lv Toullng Agents 



1. Silt . SiJ-t occurred on all the panels of "both the control 

 and test aeries. The deposits were mostly traces, or sometimes light on 

 the panels of the control aeries, and light or moderate on the panels 



of the test series. 



2. Algae . Green algas were recorded on 8 of the 15 control panels 

 and on all except one of the 15 test panels. On the control panels, the 

 growth was but a trace or sometimes light, while on the test panels, it 

 was mostly light to occasionally moderate. The only specimen identified 

 was Enteromorpha . 



5. Invertehrate animal phyla . 



a. Coelenterata (hydroids ) . Hydro! ds occurred on 5 of the 

 15 control panels, and on 8 of the same number of test panels. Their 

 growth was only a trace, except on 2 of the test panels, where it 

 rated light and moderate, respectively. Tuhularia was the only form 

 identified. 



b. Bryozoa (encrusting ). A few colonies of encrusting 

 Bryozoa ( Cryptosula pallasiana ) were recorded on the first one of the 

 control panels and on 2 of the test panels. 



c. Annelida (annelid worms ). A trace of serpulid ( Serpula ) 

 tubes occurred on a single test panel. 



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



on only the first one of the control panels and on 5 of the 15 test panels. 

 The maximum diameter attained vaa 15 mm on the first of the control 

 panels, which had been inadvertently exposed for h months. The maximum 

 diameter recorded on the test panels was 12 mm on one submerged for 11 

 months. Thirty amphipods ( Corophium ) were recorded on a single test panel. 



e. l4ollusca (nonboring molluaks ). A few specimens of Mytilus 

 (mussels) were recorded on only a single one of the test panels, where 

 ihey attained a maximum length of 15 mm. 



AI2.O5 SuTTimary and Conclusions 



1. Installation . A test board of the panel type was operated 

 at the U. S. Naval Station at Cape May, New Jersey, from August 5, 19kh 

 until its discontinuance on May 8, 19^6, to deteimine the identity and 

 prevalence of marine borers and fouling organisms occurring at this, 

 location. 



59 



