192 



Table 3. The production of oildrops by the isolated green chloro- 

 phyll corpuscles of the Spongillidae in light. Ravel preparations of 

 living sponge tissue (pag. 12, 1). Column A indicates wether the 

 chlorophyll corpuscles were in light (1.) or in darkness (d.) during the 

 period preceding the examination; column B indicates the number 

 stated of green chlorophyll corpuscles containing an oildrop per 100 

 green corpuscles. Some less exact experimental series are left out. As 

 for the discussion, see pag. 20. 



Table 4. Cultures of the isolated green and colourless chlorophyll 

 corpuscles of the Spongillidae in various feeding media in light and 

 in darkness; their composition examined by 7neans of tnicroscopic 

 preparations (pag. 12, i). The manner in which these cultures were 

 obtained and kept, as well as the composition of the media, is 

 mentioned on pag. 9 — 12. 



