300 1- 



200 - 



Mean per Core and 95-percent Confidence Interval 



100 



V- 



1971 1972 I 1972 



Figure 15. Mean per core of juvenile bivalves (upper graph) and number 

 of individuals of the total fauna and Hetevomastus 

 filohranohus (lower graph) (arrow indicates disposal). 



48 



