Breeding Temperatures of Mytilus — Allen 
evidence of similarity in their ecology sug- 
gests that the relationship between the two 
species may be closer than is at present ac- 
knowledged. It would be of interest to dis- 
cover whether the genus as a whole displays 
such a uniformity or whether other species 
differ in their breeding behaviour. Although 
these data are very incomplete, they are pre- 
sented, not only to draw attention to this 
interesting question, but also in the hope that 
other workers may be able to furnish addi- 
tional information. 
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Allen, F. E., and E. J. F. Wood. 1950. The 
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Engle, J. B., and V. L. Loosanoff. 1944. 
On season of attachment of larvae of My- 
tilus edulis Linne. Ecology 25(4): 433-40. 
Graham, H. W., and H. Gay. 1945. Season 
of attachment and growth of sedentary 
marine organisms at Oakland, California. 
Ecology 26(4): 375-386. 
EIutchins, L. W. 1947. The bases for tem- 
perature zonation in geographical distribu- 
tion. Ecol. Monog. 17(3): 325-335. 
Ralph, P. M., and D. E. Hurley. 1952. The 
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Port Nicholson, Wellington, New Zealand. 
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