Abstract
Detailed data have recently been given on the growth rate, under varying conditions, of the common barnacles, Balanus balanoides (L.), B. crenatus Brug. and B. balanus (L.) da Costa (Barnes & Powell, 1953; Barnes, 1955; Barnes & Barnes, 1954). This work has now been extended to Chthamalus stellatus (Poli). Some observations have been made on populations growing in their natural habitat, but most relate to animals growing under conditions of continuous immersion such as are obtained by exposure from a raft.
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