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 Rejuvenescence of the Individual with that of 

 the Species . 306 



a. Examination of the reproduction of the Mosses and Ferns 



in reference to this . . . .308 



b. 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 Cytisus Adamt) . . . 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 recollection of the inherent 

 Vital Purpose . . . . .324 



EXPLANATION OF THE PLATES . . . .327 



INDEX ... .337 



ADDENDUM. At page 9, line 5, insert after 



" Rheum with 6, outer, shorter, and 3 inner, longer;" "in Polygons 

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



