BIOLOGICAL BULLETIN 



OF THE 



Marine ^Biolooical laboratory 



\\< >ODS HOLE. \\ 



VOL. XLVIII 



MAY, 1925 



XO. 5 



. i i \MI. I .. R. 



\\ il I'll. I l>\\ AKIi I 



I 



SMI in. II \K\ i^ M 



CONTENTS 



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I'l UltMlKI" MONIULY BY THE 



MARINE BIOLOGICAL LABORATORY 



PRINTED AND ISSUED BY 



I ANCASTKR PRI.SS INC. 

 I ANCASTER, PA. 



AGBNT FOR GREAT BRITAIN 



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