94 ILLINOIS STATE ACADEMY OF SCIENCE 



vinced that the rich and rare opportunities for the study 

 of the physiology of multicellular organisms, a study even 

 of such recondite subjects as ductless glands and internal 

 secretions in multicellular organisms, are all of them il- 

 luminated, or may be illuminated, by a study of the uni- 

 cellular and multicellular organisms which inhabit the 

 waters of a dying lake prior to the time when the higher 

 plant and animal life vanished because of the over-con- 

 centrated solutes in the water. 



