CONTENTS. 



I. DERIVATION OF ORGANIC BEINGS. 



Page. 



1. Parental Derivation a distinctive character of Or- 

 ganic Bodies, ..... 1 



2. Grounds for disallowing the theory of a Physical 

 Derivation or Spontaneous Generation of Living 

 Beings, ...... 



3. Derivation from one, or from two Parents, 9 



4. Tendency of these modes of propagation to Alter- 

 nate, or recur periodically, when they co-exist in 

 the same species, ..... 10 



5. Distinction of Cases of Alternation into protomor- 

 phic, orthomorphic, and gamomorphic, according 

 to their relations in the Genetic Cycle, . 12 



6. Indications of Representative Phenomena in the 



Higher Species, ..... 15 



II. SURVEY OF THE REPRODUCTIVE PROCESS IN THE 

 VEGETABLE KINGDOM. 



1. Introductory Remarks, ... 17 



2. General character of the process in the Vegetable 



Kingdom, ..... 20 



3. Reproduction in the Protophyta, . 

 4. In Algae generally, and Characeae, 

 5. In Fungi and Lichens, 

 6. In Hepaticse and Mosses, 



7. In Ferns and Equisetacese, 52 



8. In Lycopodiacese and Rhizocarpese, . 55 



9. In Gymnospermous Phanerogamia, . 57 



10. In Angiospermoiis Phanerogamia, . 61 



11. Concluding Remarks, ... 66 



