CONTENTS. 



PAGE 



I. Of the Algje generally 1 



II. Of the Diatomaceje 11 



III. Of the Free Diatomaceje . . . . 14 



IV. Of the Stipitate Diatomaceje . 30 



V. Of the Characteristics of the Diatomaceje . 37 



VI. Of the Desmidiaceje, and some similar minute 



Algje 50 



VII. Of the Filamentous Algje 62 



VIII. Of the Oscillatorije . . . . . . 76 



IX. Of the Gelatinous, Crustaceous, and Stone-like 



Algje 82 



X. Of the Marine Algje , ... 89 



XI. Of the Characeje 107 



XII. Of the Fungi . . . . . . . .115 



XIII. Of the Lichens . . . . . . .132 



XIV. Of the Mosses and their Allies . . . .139 

 XV. Of the Ferns and Flowering Plants . . .154 



XVI. Of the Herbarium .... .174 



