BIOLOGICAL BULLETIN 



OF THE 



noannc JBiolooioal laboratory 



>DS HOI H. M 



VOL. XLVIII APRIL, 1925 No. 4 



CONTENTS 



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EDWARDS, J. GRAHAM. in- 



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1' Hl.lsllE:> MoNIHLY HY THE 



MARINK lilo! OGICAL LABORATORY 



PH1NTEI' A' BU BY 



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AGENT FOR GREAT BRITAIN 



\V HE I.DON & WKSLEY, LIMITED 



a, 3 and 4 Arthur Street, New Oxford Street, London, W. C. 2 



Single Numbers, $1.00. Per Volume 6 numbers). S4.5O 

 October 10. 1001. at Lancntter. Pa., as KCond-clas* matter under Act of CongreM of July 16. 1894. 



