Hkble 5, — Location, number and duration of attacks by the drills, and food 

 organisms involved, for tank h, Experiment I 



A: species attacked —' B: location _' C: duration of attack in days 



Drill 1st 

 number attack 



A-B-C A-B-C A-B-C A-B-C A-B-C A-B-C A-B-C 



M-C4-3 M-A4-3 M-A6-3 



C-B6-2 



M-C6-3 M-I4-4 M-A4-3 M-G6-4 



C-J2-6 



1/ M = mussels; C = clams; = Olympia oysters; P = Pacific oysters. 

 2/ Gives column and row where attack took place (see figure 4). 



11 



