338 



GEACE MEDES 



periments performed this second season had shown that the 

 larvae were more viable and it was hoped to maintain those in 

 the dilute solutions alive longer in order to determine the results 

 at the period of their rnaximum size. 



Control. 



Larger than control. 



Of about the same size as control. 



Somewhat smaller than control and less highly developed. 



Smaller and in less advanced stage of development. 



Has not passed beyond tri-radiate stage. 



The following solutions were employed: (S. W. is used in 

 the following tables to designate normal sea-water. C. S. W. 

 indicates normal sea-water concentrated to one-half its volume' 

 by continuous heating at 70°C.). 



