ALG^l. 



PI. 11O 



Closterium species 



Closterium 

 postratum 



Closterium parvulum 



Clostepium moniliferum 



Closterium 



Leiblenii 



Clostepium 

 lunula 



Clostepium 

 acurninatum 



Clostepium 

 costatum 



Clostepium 



Ehrenbergii 



VII. CONJUGATE 



3. Desmidiacese 



