No. 2.] 



BA TRA CMOS EPS . I TTENUA TUS. 



IOI 



The plasmosphere is the outermost sphere ; the granosphere 

 is the innermost one. The plasmosphere is the first one to 

 break up into minor parts. These arrange themselves in the 

 equatorial of the cell and serve as material for the mantle fibers 



FIG. 2. Auxocyte in the "imperfect resting stage," showing the formation of leaders consisting 

 of round chromioles surrounded by a film of chromoplasm. The leaders start from two 

 chromoplasts of unequal size, both containing endochromatic granules. The leaders are 

 connected by a linosomic network. Four linoplnsts. In the cytoplasm are seen the two 

 spheres, the inner one, the granosphere, containing the archosome. There are eight acces- 

 sory archosomes, some in the plasmosphere, others in the cytoplasm. The two spheres are 

 of a foam-like structure. The cytoplasm is only partially indicated. 



and for the new cell wall which is formed when the two daugh- 

 ter-cells separate. 



The granosphere remains longer, but when it breaks up 

 it furnishes material for the fibers of the central spindle. It 

 also constitutes the main dwelling place of the archosome. 



