SALVINIA 



421 



4. The same, superficies in focus : even in this way, the smaller 

 cells are visible adhering to the inner surface. 



5. Another of the same capsule : rather too large. This shews 

 that the grumous nucleus has some connections with the peri- 

 phery, probably by parts not converted into cells and unab- 

 sorbed. 



6. Another of the same, in a rather younger state, the small nu- 

 celli in the grumous nucleus are the rudiments of cells : 



7. Another more advanced, the only change is the encroachment 

 of the central cell or the grume by its enlargement. 



8. Central cell detached, shews its trifacial attaching face. 



9. Portion of the grumous contents escaped from pressure, shew 

 the cells in various states the 3, 4, facial are the mature form 

 of the sporules, the 4 nucellar one was only seen once ; no 

 lines of division were seen. 



The greenish nucelli are very common, generally with a faint 

 indication of a cell, round them (very obscure.) 

 10. Confervoid filaments attached to the out side of the capsule. 



Fig. IT. — 1. Long section through the centre of the young cap- 

 sule, hairs removed entirely, 1 inch F. D., magnified about 45 

 times. 



2. One of the young secondary capsules 



2a. 2b. Two ditto 1-16, the lower one shews the development to 

 be the same as in the other body, excepting the absence of the 

 central cell in the grumous nucleus. 



3. The same in diluted spiritous solution of iodine. 



4. Represents a less advanced state. 



5. The same 1-16. 



6. The same (iodine.) 



So that it is apparent that the differences consist first in the 

 t greater number of secondary capsules developed, secondly in 

 the absence of the central cell in the grume, on which all the 

 rest of the changes seem to depend. 



Mem. Chara is another form of the same kind, more dis- 

 guised : but similar changes take place in the female, and pro- 

 bably in the male ; i. e. as regards abortive sporula. I have 

 seen the trifacial cells in the young females ! 



t 3 



