.-i 



\ 



-v* 



■fl!ii^3^«s?«* 



GAS EXCHANGE IN THE 

 PNEUMATOCYST OF NEREOGYSTIS 

 LUETKEANA (Mertens) P. & R. 



SANFORD MYRON ZELLER 



Missouri Botanical Garden 



St. Louis 



and 



ABIGAIL NEIKIRK 



University of Washington 



Seattle 



/I a6 r. 



"^^2, 33 oL Id 



PUGET SOUND MARINE STATION PUBLICATIONS 



' ' » 



Vol. 1, No. 5, pages 25-30 July 1, 1915 



