70 



SUPER-ORGANIC EVOLUTION 



The most curious phenomena of cellular division, 

 called mitosis by Flemriing, and karyokinesis by 

 Schlezcher, are, to sum them up, the following : 



Every cell is composed of protoplasm nucleus 



FIG. 16. 



Epithelial cells in course of karyokinetic division of the skin of the larvae of 

 the Pleuro of the Walti. 1, rest ; 2, reticulation ; 3, coarse reticulation ; 

 4, reabsorption of the nucleolus and glomerule phase ; 5, ovary liga- 

 ments ; 6, pins. 



and nucleolus. The nucleolus is the little black spot 

 which we see in fig. 16 (1), at nearly the centre of 

 the nucleus ; thus, as the girdle surrounding this is 

 the protoplasm, that and the nucleus give rise to 

 phenomena more easy to observe in the cellular 



