Oktle h. — location, number and duration of attacks by the drills, and food 

 organisms involved, for tank 3, Experiment I 



i: species attacked i.' B: location -' C: duration of attack in days 



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

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



10 



