XXVUl CONTENTS. 



Page 

 Artificial Analysis of the Natural Orders in the Sub-class 



AcrogensB . . . .717 



Sub-class 2.— Thallogense . . .717 



293. Lichenes . . . . 717 I 295. Algae . . . .723 



294. Fungi 719 | 



Artificial Analysis of the Natural Orders in the Sub-class 



ThallogenEe 727 



BOOK III. 



PHYSIOLOGY. 



CHAPTER 1. 

 special physiology . . .729 



Section 1. 



physiology of the elementary structures . 729 



1. Functions of Parenchymatous Cells and Parenchyma . 729 



1. The Formation of New Cells . . . .729 



A. Free Cell-formation 730 



a. Free Cell-formation from a Nucleus . 730 



b. Free Cell-formation without a previous 



Nucleus 732 



B. Cell-division 732 



a. Cell-division without Absorption of the 



Walls of the Parent Cell . . .732 



b. Cell-division with Absorption of the 



"Walls of the Parent Cell . . .734 



2. Absorption and Transmission of ¥luids . . 736 



3. Movements in the Contents of Cells . . . 737 



4. Elaboration of the Cell-contents . . .• . 739 



2. Functions of Prosenchymatous Cells and Prosenchyma. 739 



3. Functions of Vessels and Vascidar Tissue . . . 740 



Functions of Laticiferous Vessels or Tissue . . 740 



4. Functions of Epidermal Tissue 741 



Origin and Development of Stomata . . . 742 



5. Functions of the Appendages of the Epidermis . . 743 



6. Functions of the Intercellular System .... 743 



