c. Marine Rallvay . Teredlnldae occurred as minute pits In 



2 of the last 5 of the 28 cpntrol panels received In 19^6. They occxirred 

 In 20 of the 38 test panels, attaining a maTlmnTn length of ^kO mm In one 

 panel removed on June 20, 19^5, after having "been suhmerged for 11 months. 

 This pajiel showed the heaviest attack of any, "being veil filled. The 

 maximum attack at this location thus rated very heavy In 19^5 and only 

 a trace In 19^6. 



d. Voody Island Pier . Teredlnldae occurred as minute pits 

 In only one of the 57 control panels. They occurred in 22 of the 37 test 

 panels, attaining a maximum length of 3OO mm in one panel removed on June 

 20, 19^1-5, after having "been submerged for 11 months. The attack at this 

 location rated moderate in 19^5^ medium heavy in 19^6, and only a trace 

 in 1947. 



e. Army Pier . Teredlnldae occvirred as a few minute pits or 

 embryonic specimens in 5 of the 16 control panels and in 10 of the I6 

 test panels, attaining a msLximum leiagth of 3OO mm in 2 of the test 

 panels removed on July 20 and August 21, respectively, in 19^5^ after 

 having been submerged for 11 months. The attack at this location rated 

 moderate in 19^5. 



2. Llmnoria . Llmnarja were more or less active at each of the five 

 locations. Their occurrence is summarized for each place as follows: 



a. Temporary Pier . Limnoria occurred on 12 of the 30 control 

 panels, although none occurred until aJFter April I5, 19^5- Except for the 

 last psmel, which was left submerged for 5 months, the maximum number 

 occurring on any panel was 110. Llmnorla occurred on 18 of the 30 test 

 panels, but not on those panels removed up to July 20, 19^5- The attack 

 rated only a trace In 19^5 j and medium heavy late in 19k6 and early in 

 19^7, in panels left submerged for 11 and 125- months, respectively. 



b. Permanent Pier . Llmnorla occurred in only k of the 59 

 control panels, althoiigh none occurred until after September 25, 19^6. 

 The maximum number on emy panel was 28. They occurred on all except the 

 first k of the 59 test panels. The four exceptions had been submerged 

 from one to h months each, respectively. The attack rated only a trace 

 in 19i)-5 and 19^6 and slight in 19^4-7. 



c. Marine Railway . Llmnorla occurred on 9 of the 28 control 

 panels, although none appeared until after April 15, 19^5* The maximum 

 number on any panel was 25. They occurred on 27 of the 58 test panels. The 

 attack rated slight in 19^5 and medium heavy in 19^6. 



d. Woody Island Pier . Llmnorla occurred sporadically in 



8 of the 37 control panels, although none appeared until after August 21, 

 19^5. The maxifflom number was only k in any panel. They occurred In all 

 except 5 of the 57 test panels. The attack rated slight in 19'<-5, 19^6, 

 and 1947. 



Ikj 



