236
J. A. KITCHINO AND F. J. EBLINQ
0
Metres
B 1-10 per 1OOOsq.cm.
(b)
FIQ. 24. Distribution of Mytilus edulb on boulders in the Lough Ine Rapids in July 1950
(a)
FIO. 25. Distribution of Sertularia operculata on boulders in the Lough Ine Rapids in
July 1948.