210 



Tarle 41. CulUircs of isolated green chlorophyll corpnscles of 

 Spoiigilla in iraier, in ligJit or in darkness. Cowparison of the nnm- 

 ber of oildrops occurring free in the cidliires to that present in the 

 gree)t corpuscles, ivith respect to thi' /iHiiilx'r of green stages of divi- 

 sion and the nuinher of colourless corpasclcs KÜIhont structure pre- 

 sent in tlie cultures. 



In the chief experiment (n** '290) several other cnltnres have been 

 made of one original culture, on two dillerent moments. These new 

 cultures are indicated in the tables by braces proceeding from the 

 original culture. All these cultures were from time to time microsco- 

 pically examined as to oildrops etc. (pag, 13 — 15). The observations 

 concerning a same culture are united in the table by short lines. The num- 

 bers joined to the braces and lines' indicate the time (in months) 

 between the two observations; 1. means culture in light, d. culture 

 in darkness. For each observation is mentioned: sub 1 the number of 

 the green chlorophyll corpuscles, sub 2 that of tlie green stages of divi- 

 sion, sub 3 that of the colourless corpuscles without struc^ture, sub 4 

 that of the^ green ones containing an oildrop, sub 5 that of the free 

 oildrops; always the number present in the whole microscopic prepara- 

 tion. As for the meaning of I — XII, see pag. 14 — 15; as for the 

 discussion, pag. 86 — 87. 



Table 12. Tlie rnonher of oildrops per amoebocyie in the tissues 

 in different stages of development (conf. Table 6) of green Spongil- 

 lidae from light and in colourless ones from darkness (may be also 

 from light); microscopically examined by means of ravel preparations 

 from newly captured living sponges (p. 12 — 15). 



For Spongilla these observations are given in 4 groups (conf. Table 0), 

 viz. for the tissue of i. branch- tops 5. branch-bases 3. difterentgemmule 

 stages 4. sponge-disks ; for Ephydatia only for full-grown tissue (Table 6). 



In the tables is indicated: a. the month of the examination. f>. The 

 number then stated: in column 1 the (average) number of oildrops 

 per amoebocyte, in col. 2 the number of the green chlorophyllcorpuscles, 

 in col. 3 that of the green corpuscles containing an oildrop, in col. 4 

 that of 'the colourless ones without structure ; in the last 3 cases the 

 number present in the whole microscopic preparation. On each hori- 

 zontal line the data concerning one sponge piece are given; sub 5 

 the analyses of different pieces of a same sponge are indicated by 

 the same letters. Finally for each tissue group the data, concerning 

 all analyzed sponges together, are composed; this composition sim- 

 plifies of course the mutual comparison of the results of the different 

 groups. As for the meaning of I — XII, see pag. 14; as for the dis- 

 cussion, pag. 85, 87—89. 



