BIOLOGICAL BULLETIN 



OF THE 



HDarine Biological Xaboraton? 



WOODS HOLE, MASS. 



VOL. LI I 



MARCH, 1927 



No. 3 



HARVEY, ETHEL B. 



PAGE, IRVINE H. 

 PAGE, IRVINE H. 

 PAGE, IRVINE H. 



KEPNER, W. A., AND 

 JESTER, P. N. 



HAASE, MARGARET R. 

 FRIEDMANN, HERBERT 

 WEATHERBY, J. H. 



WEIMER, B. R. 



CONTENTS 



The Effect of Lack of Oxygen on Sea Urchin 

 Eggs . 147 



The Composition of Woods Hole Sea Water. . . 161 

 The Oils of the Sea Urchin and Star Fish Egg. . 164 



The Electrolytic Content of the Sea Urchin and 

 Star Fish' Egg 168 



The Reaction of Hydra to Inanition 173 



Ciliated Pits of Prorhynchits stagnalis 185 



Tcsticular Asymmetry and Sex Ratio in Birds . . 197 



The Function of the Contractile Vacuole in Par- 

 amecium caitdatnni; -icith Special Reference 

 to the Excretion of Nitrogenous Compounds . . 208 



The Use of Nile Blue Snlfntc as a Vital Stain 

 on Hydra 219 



PUBLISHED MONTHLY BY THE 



MARINE BIOLOGICAL LABORATORY 



PRINTED AND ISSUED BY 



LANCASTER PRESS, INC. ^ 

 LANCASTER, PA. 



AGBNT FOR GREAT BRITAIN 



WHELDON & WESLEY, LIMITED 



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Single Numbers, S1.0O. Per Volume (6 numbers), $4.50 



Entered October 10, igoa, at Lancaster, Pa., as second-class matter under Act of Congress of July 16 , 1894 



