The Influence of Environment 



o'o 



TABLE XVm-Continued 



These experiments indicate that the ratio of 



CXa-f-i: 



<-^Ca+Mg 



remains very neariy constant with varying concentra- 

 tions of CNa+K. 



In former experiments on jellyfish the writer had 

 shown that there exists an antagonism between Islg 

 and Ca', and this observation was subsequently con- 

 firmed by Meltzer and Auer^ for mammals. It was 

 observed that in a solution of NaCl+KCl+MgCh 

 the larvse of the barnacle were also not able to remain 

 at the surface for more than a few minutes, while an 

 addition of some CaCU made them swim permanently 

 at the surface. Various quantities of IMgCl^ were 

 added to a mixture of m/4 or m/2 NaCl + KCl, to find 



* Loeb, J., Joiir. Biol. Chem., 1905-06, i., 427. 



» Meltzer, S. J., and Aucr, J., Am. Jour. Physiol., 1908, xxi., 4(X). 



