CX)NTENTS, 



xvu 



PAGE 



Ebmology of the Ovule Part 6 808 



Beproductive Organs of Cycadex „ 808 



Cell- and Nuclear Division in the Fc/rmaticm. of the Pollen of 



Eemerocallis fulva „ 809 



Structure and Growth of the Cell-wall '. „ 810 



Order of Appearance of the Primary Vessels in Aerial Organs „ 812 



Collenchyma „ 812 



Stomata in a Fossil Plant „ 813 



Spiral Cells in Crinum and Nepenthes ,, 813 



Structure of Secretory Glands „ 814 



Sphere-crystals „ 815 



Eespiration of Detached Shoots „ 815 



Physiological Functions of the Tissues of Plants .. ., „ 816 



Chlorophyll and Hypochlorin „ 817 



Function of Chlorophyll ., „ 818 



Vitality of the Chlorophyll-pigment „ 818 



Action of various Gases on Plants , 818 



Power of Plants to absorb Carbonic Oxide . . , , 819 



Formic Acid in Plants ,, 819 



Function of Lime-salts ,, 819 



Function of Pesinous Substances „ 820 



Change of Starch into Sugar at low temperatures , 821 



Colours of Flowers .. „ 821 



Causes of the Etiolation of Plants ,, 822 



Origin of Galls , ,, 823 



Chemical Difference between Living and Dead Protoplasm „ 902 



B. — Ceyptogasiia. 

 Cryptogamia Vascularia. 



ProthalUum and Embryo of Azolla Part 1 76 



Development of the Sporangia and Spores of Isoetes .... „ 78 



Development of Sporangia Part 2 224 



Lenticels of the Marattiacece „ 225 



Stomata in the Leaf-stalk of Filicinece 226 



Adventitious Buds on the Lamina of the Frond of Asplenium 



bulbiferum , 226 



Anatomy and Classification of Schizceacex „ 226 



Biological Peculiarity of Azolla. caroliniana „ 227 



Relation of Nutrition to the Distribution of the Sexual 



Organs on the ProthalUum of Ferns Part 3 374 



Cell-division and Development of the Embryo of Lsoetes 



lacustris 375 



Schizoeacece Part 4 533 



Male Fructification of Polytrichum Part 6 823 



Muscineae. 



New Genera of Mosses Part 1 79 



Classification of Sphagnacece , , , , . , 79 



Female Beceptacle of the Jungermannieas Geocalycece . , Part 2 227 



yegetative Reproduction of Sphagnum ^^ 228 



Ser. 2.— Vol. II. 5 



