208 



Table 9 B. N» 389. 



Table 10. TJw intensity of nnittiplication of the green eliloropliyll 

 corpuscles of the Spongillidae and the total increase or decrease of the 

 ivJiole mimher of green corptiscles, when cultivated i7i sponge-tissue 

 or in ivater, in light or in darkness. 



Generally of each sponge a piece was cultivated in an aquarium in light 

 and anotlier one under equal circumstances in darkness (p. 8); such 

 pieces of one sponge are indicated in the tables with the same n". 

 All tliese sponges have been mentioned already in Table 8 on account 

 of the changing of their colour and their amount of various chloro- 

 phyll corpuscles. As stated there, the factors of import, (export), reduc- 



