195 



Table 5. Tlie transition of isolated green eJilorophyll corpvscles of the 

 Spongillidae into .the siiccessive colourless stages^ brought about under 

 various circumstances either in cultures (conf. Table 4) or in vaseline pre- 

 parations (pag. 42, i), and studied by stating the number of tlie various 

 chlorophyll corpuscles present in a microscopic preparation (pag. IS-i-i). 



In the table is indicated: a. The n" of each culture or of each prepa- 

 ration, b. The species (s. = Spongilla; e. = Ephydatia) from which 

 the corpuscles were taken, c. The date of the examination, d. Wether 

 the corpuscles were kept in light (1.) or in darkness (d.). e. The num- 

 ber of the various corpuscles stated : sub 1 tliat of the green ones, 

 sub 2 that of the ,, colourless ones with clearly marked out structure" 

 (p. A'-I), .sub 3 that of the ,, colourless ones with shade of structure", 

 sub 4 that of the ,, colourless ones without structure", and sub 5 that 

 of the ,, vague shades of colourless ones" without structure. In the last 

 column is mentioned, wether the.se data concern a culture or a vase- 

 line preparation and under what special circumstances it was. As for 

 the meaning of I — XII, see pag. 1-4; and for the discussion, see pag. 

 43, II; p. indicates that the green corpuscles have grown pale. 



