200 



sponge. h. Wetlier the spoiige, at the moment of its analysis, was 

 brouglit trom its habitat in nature to the aquaria for more (n.) or 

 less (i.) than 2 weeks ago; in tlie first case we may say, that pro- 

 bably a good deal of the influence of the import of clilorophyll cor- 

 puscles (p. 50) on the amount of these corpuscles in the sponge will 

 have disappeared; but not, however, in the last case. c. The number 

 of the vai'ious chloropliyll corpuscles present in tlie tissue: in column 1 

 that of tlie green ones, in col. 2 that of the green stages of division, 

 in col. ;3 that of the ,,colourless corpuscles with structure" (p. 42), in 

 col. 4 that of the ,,colourless ones without structure" (,,vague shades" 

 excluded); always the number })resent in the whole microscopic pre- 

 paration, present, therefore, in an almost equal volume of each sponge. 



The data concerning one sponge piece are given on one horizontal 

 line. Sub 5 the analyses of different pieces of a same sponge are 

 indicated by the same letters. All analyses are mentioned. As for the 

 meaning of I — XII, see pag. 1-4. At last for each tissue-group of the 

 green and colourless sponges the amount of tlie various chloropliyll 

 corpuscles, present in all analyzed sponges together, is composed. 

 This composition simplifies of course the mutual comparison of the 

 results of the different groups. 



As for the discussion, see pag. 46 — 48 and 7(3. 



