vm 



CONTENTS. 



4. The Distribution of Species. 



Page 

 790 



The Distribution of Species by Offshoots, 

 The Dispersion of Species by means of Fruits 



and Seeds, ------ 833 



Limits of Distribution, ■- - - 

 Plant Communities and Floras, - 



5. The Extinction of Species, - 



Page 



- 878 



- 885 



- 899 



CLASSIFICATION OF PLANTS PKOPOSED BY 

 THE EDITOR. 



Phylum 1. — Myxothallophyta. 

 Alliance 1. — Myxomycetes, - . - 618 



Phylum 2. — Thallophyta. 



Class I.- Schizophyta, . - - - 820 

 Alliance 2. — Cyaiiophycese, the Blue-green 



Algfe, 621 



Alliance 3. — Schizomycetes, the Bac- 

 teria, 622 



Class II. — Dinoflagellata, Peridinese, - - 625 

 Alliance 4, - - - - - 



Class III. — Bacillariales, - - - 

 Alliance 5, - - - - - 



Class IV. — Gamophycese, - - - 



Sub-class I. — Chlorophycese, the Green 



Algge, - - 627 



Alliance 6.^Protococcoideae, - - - 628 

 Do. 7. — Siphonese, - - - - 641 

 Do. 8. — Confervoidese, - - - 648 

 Do. 9. — Conjugatse, - - - - 654 

 Do. 10.— Charales, - - - - 659 

 Do. 11. — Phseophyceae, - . - 661 

 Do. 12.— Dictyotales, - - - 666 



Do. 13.— FloridesBi Eed Sea-weeds, - 666 



625 



625 

 625 



627 



Class II. — Pteridophyta, Vascular Crypto- 

 gams, ------- 704 



Alliance 22.— Filices, Ferns, - - - 705 

 Do. 23. — Hydropterides, Rhizocarps, 709 

 Do. 24.— Equisetales, Horsetails, - 711 

 Do. 25. — Lycopodiales, Club-mosses, 713 



Phylum 4. — Phanerogamia, Flowering 

 Plants. 



