XIV CONTENTS. 



PAGE 



a. Criticism of Sohultz's doctrine of tlie Anaphyta of 

 tlie plant . . ■ -102 



*. Criticism of E. Meyer's and other views of tlie building 

 up of the plant out of leaves ; and also of Steenstrup's 

 view of the Alternation of Generations in the plant 106 



e. Relation of the stem to leaf-formations . . 1 08 



Explained by the examination of the fundamental 

 organs of the plant . . . 109 



d. Course of formation of the leaf . . .112 



e. Observations on Phyllotaxy . . . 116 



III. Cell-pormation, constituting the immediate focus of the pheno- 

 mena of Rejuvenescence .... 121 



1. Formation of the Cell, generally . . .123 



a. Departure of the plant and of the Vegetable kingdom from 



the simple cell .... 124 



a. Unicellular plants in the different senses of the 



term .... 124 



/3. Graduated succession of Multi-cellular plants . 130 



b. The single cell, examined by itself . . .155 



a. The various meanings of the word Cell . .155 



/3. Membrane and contents of the Cell . .155 



y. Cells without membrane . . . 156 



S. Coat of the contents (primordial utricle) . .156 



£. Eurther subdivision of the contents . . 169 



I. Nucleus ..... 174 



2. Destruction of the Cell, a preparatory condition to its Reju- 



venescence ..... 176 



A. The Cell-membrane . . . .176 



a. Dissolution of this . . . 177 

 a. Through tearing . . 177 

 /3. Through complete peeling (Skinning of the cell) ISO 

 y. Escape of the Rejuvenescent cell from the 



old coat (demonstrated more particularly in 

 the active gouidia of the y//^<«) . .182 



S. Examples of imperfect liberation of gonidia . 187 



b. Softening and Solution of the Cell-membrane . 189 



B. Processes of Destruction in the contents of the cell 195 

 a. Solution of Starch . . . .196 

 h. Disappearance of Fat . . . . 202 



Caused by previous desiccation . . 205 



(Illustrated by the history of Clilamidococcus and 

 Chlamidomonas) .... 205 



