Maximum diameters of 6 mm vere attained on the control panels^ iihlle 

 on the test panels the mMclmmi diameter recorded vas only 5 Jbw after 

 8 months' submergence. Amphlpods ( Corophlum ) occuirred only on the 

 first 2 panels of "both the control and test series, there being from 

 lOO to 200 Individuals on each of these panels. 



d. MolluBca (nonborlng mollnsks ). Hytllus (mussels) 

 occurred on "both the first 5 control and test panels, and also on 

 one of the test panels removed later. The maximum growth recorded 

 vas a lei]gth of ^ mm In one month and 8 mm In J2 months. 



e. Chordata (tunlcates ). Tunlcates vere found on one of 

 the control panels and on 2 of the test panels, to the extent of 5 to 

 15 colonies. The only one Identified vas Botryllus schlosserl . 



AI6.O5 Summary and Conoluslons 



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

 at the U. S. Naval Receiving Station on Cockspur Island, In the Savannah 

 Blver Ik miles south of Savannah, Georgia, to determine the Identity 

 and prevalence of marine horers and fouling agents occurring at this 

 location. 



2. Test Results . 



a. Borers . Teredlnldae vere very active throughout the 

 period covered by the test and proved extremely destructive, riddling 

 panels In as short a period as 5 months. The attack vas so destructive 

 that the use of panels 2 Inches thick vas reconnnended. In contrast 

 to the extremely severe Teredlnldae attack at this Station, Llmnorla 

 were edmost completely lacking. 



h. Fouling Organisms . Silt and Invertehrate animals 

 "belonging to 5 phyla vere found to contribute to the fouling of the 

 panels. The latter comprised hydrolds, encrusting Bryozoa, hamacles 

 and an^ihlpods, mussels, and tunlcates. Of these organisms, hydrolds and 

 barnacles occurred most frequently; the others vere rather sporadic In 

 occurrence . 



78 



