ON THE EFFECT OF LOW SALINITY ON 

 TEREDO NAVALIS 



BY 



HAROLD FRANCIS BLTJM 



CONTENTS 



PAGE 



Introduction 350 



Methods and equipment 351 



Observations 353 



Effect of low salinity 353 



Decrease in activity 353 



Lethal salinity 356 



Natural protection against unfavorable salinity 358 



Factors limiting protection 359 



Survival period or lethal stretch 364 



Resistance to sudden changes in salinity 366 



Summary 367 



Literature cited 368 



