XVlll CONTENTS. 



PAGE 



Protective Sheath audits Strengthenings Part 5 679 



Hnptera „ 680 



Clilorophyll and Chlorophyllan „ 680 



Chhro2')hyU and the Distribution of Energy in the Solar 



Spectrum ,» 682 



Crystalline Secondary Pigments of Chlorophyll „ 682 



Crystalloids in the Pyrolaceos „ 683 



Imilin in the Artichoke „ 683 



Mentzelia IcBvicaulis as a Fly-catcher „ 683 



Fertilization of the Borraginacece Part 6 864 



Pollination of Cypella „ 864 



Pollination of Putacece „ 864 



Division of the Nucleus ,, 864 



Albumen, Nuclein, and Plastin „ 866 



Chemical Changes in the Germination of Barley .. .. „ 866 



Function of Ami/gdalin in Germination „ 866 



Galvanic Phenomena in Germinating Seeds „ 867 



Ilcchanical Protection of Seeds against External Injury .. „ 867 



Lignification of Epidermal Membranes „ 868 



Protective Sheath and its Strengthenings „ 868 



Laticiferous Tubes ,, 868 



Medullary Vascular Bundles of some Dicotyledons .. . . „ 869 



Nutating Internodes „ 871 



Function of the Apex of Roots „ 872 



Transpiration and Absorption of Water by Branches in 



Winter „ 872 



Hydrotropism „ 872 



Influence of diminished Atmospheric Pressure on the Groidh 



of Plants , 873 



Effect of Radiant Heat on the Growth of Plants .. .. „ 873 



Colouring Matter of Flowers „ 874 



Botanical Micro-Chemistry ,, 874 



B. — Cryptogamia. 



Paloeontological Development of Cryptogams Part 4 536 



Organic Unicellular Bodies in Coal „ 537 



Rabenhorst's Cryptogamic Flora of Germany, ^-c Part 5 683 



Cryptogamia Vascularia. 



Chwtopteridem Part 1 98 



Development of the Spores of Salvinia „ 1)9 



Peculiar Form of Stereome in Ferns Part 2 245 



Structure and Branching of Dorsiventral Polypodiacece .. „ 245 



North American Isoetes „ 246 



Male Prothallium of Equisetum Part 3 392 



Reproductive Organs of Pilularia „ 393 



Aerial Branches of Psilotum „ 394 



Underground Branches of Psilotum „ 394 



Fibrovascular Bundles of Vascular Cryptogams Part 4 537 



Cryptogramme aiul Pellcea Part 5 684 



Vascular Bundles of the Leaf of Sphenophyllwn .. ,. Part 6 874 



Structure of Phylloglosmm „ 875 



