XVI CONTENTS. 



PAGE 



Attempt to classify the numerous kinds of Conjugation : 



A. Conjugation of Similar cells, with the subordinate modifi- 



cations . . ■ • 284 



B, Conjugation of Dissimilar cells . • • 296 

 Excluded cases . . . . • 298 



Concluding Reflections .... 305 



Connection of the KejuTcnesoence of the Individual with that of 

 the Species ..... 306 



a. Examination of the reproduction of the Mosses and Eerns 



in reference to this .... 308 



*. The formation of Varieties, in its relation to the history of 



the Individuals and of the Species . . .311 



c. Examination of Hybrids (with a particular description of 



the behaviour of Ci/Usus Adami} . . ■ 316 



2. Analogous ascent in the higher systematic divisions, from 



the species to the genus, family, order, class, &c. . . 322 



3. Rejuvenescence as universal Phenomenon of the course of De- 



velopment of Nature, in detail and as a whole, as the expres- 

 sion of a constantly re-awakened recoUeotion of the inherent 

 Vital Purpose . . . 324 



Explanation op the Plates 327 



Index ..... 337 



ADDENDUM, At page 9, line 5, insert after 



" Rheum with &, outer, shorter, and 3 inner, longer;" "in Polygonun 

 with 5, outer, shorter, and 3 inner, longer." 



