!fe.T3le 6. — Location, number and duration of attacks by the drills, and food 

 organisms involved for tank 1, Experiment II 



species attacked — 



1/ 



location 



2/ 



C: duration of attack in days 



Drill 1st 

 niimber attack 



A-B-C 



2nd 3rd 4th 5th 

 attack attack attack attack 



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



6th 7th 8th 

 attack attack attack 



A-B-C A-B-C 



A-B-C 



C-K2-8 



M-I3-2 M-El-3 M-Il-6 M-Gl-5 M-G5-4 

 M-Kl-4 M-A5-4 M-E3-3 



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

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



12 



