March 20, 19^6 to Fetruary 25, 19l»5. The attack vas especially heavy 

 from April 19, 19^6 to the end of 19^7, d taring which time 5 of the 

 panels vere filled. In the test panels, Teredlpidae occvirred In k-k 

 of the kj, attaining a mailnmrn length of 15O mm on 2 panels, both 

 of TAlch held "been suhmerged for k months. Twenty of these panels were 

 filled or riddled, although most of them had heen submerged for only 

 h months. The panels sometimes hecame filled or riddled In as short 

 a period as one or 2 months. The attack at this loca:tlon rated very 

 heavy each yesu:. Including i9'»-^. 



"b x^Hpr-2 (Ferry Sll-p at Pensacola ) . Teredlnldae occurred 

 In 2k of the kl control panels, ranging from minute pits or emhivonic 

 specimens to specimens up to 65 nm in length. The "breeding season at 

 this location extended from the middle of March through Deceniber. 

 Teredlnldae occurred in 58 of the i|-7 test panels, attaining a maacinium 

 length of 200 mm in one panel submerged for k months. Twenty-five of 

 these panels were filled or riddled, although most of the panels were 

 submerged for only k- months. They sometimes became filled or riddled 

 in as short a period as 2 months. The attack at this location rated 

 very heavy each year, including 19^. 



c. USIIPF-3 (Railroad Trestle at Naval Air Station ). 

 Teredlnldae occurred in 19 of the kO control panels, ranging from minute 

 pits or embryonic specimens to specimens up to 25 mm in length. The 

 breeding season at this location extended from the middle of March 

 through December. Teredlnldae occurred in 37 of the ^7 test panels, 

 attaining a maximum length of 220 mm in one panel submerged for k 

 months. Twenty-one of these panels were filled or riddled, although 

 most of the panels were submerged for only k months. They sometimes 

 became well filled within 5 months. The attack at this location rated 

 very heavy each year. Including 19^. 



2 Llmnorla . Limnoria were more or less active at all three 

 locations, the occurrence being summarized for each as follows: 



a. USKPF-l (Ferry Slip at Naval Air Station ). Limnoria 

 occurred on 51 of the kl control panels, the maximum nuniber on any 

 one being 19O specimens. They occurred on 39 of the kf test panels. 

 The attacks attained peak ratings of moderate in 19'«-5 and 19^6 and 

 of heavy in 19^7 



b. USNPF-2 (Ferry Slir at Pensacola ). Limnoria occurred 

 in 16 of the kl control panels, although none appesired prior to 



March 22, 19^5 • The maximum number recorded in any of these panels was 

 250 forms. Limnoria occurred on 26 of the kl test panels, eJ. though 

 none occurred up to January 22, 19^5 • The attacks attained a peak 

 rating of medium heavy in 19^5, a trace in 19^*6, and low in the slight 

 rating in 19^7. 



91 



