( 3 ) 



Summaby of CtJREENT Keseabohes, &c. — continued. 



PAGE 



Anatomy of Ankylostoma duodenale 781 



Structure of Trematodes 782 



Adaptation to Environment in the Trematoda 784 



Vascular Organs of Trematoda 784 



A natomij of Cestodes 785 



Studies a» Cestodes 78ti 



Ligula and Schislocephalus '. 786 



New Floscuhiria 787 



Desiccation of Hot if ere 787 



Heteractinism in Erhinodtnnata 788 



Circulatory Apparatus of Regular Eehinoids 789 



Structure and Development of Ophiuroids 789 



Formula for Coinatulidx 791 



Holothuroidea of the Norwegian North Sea Expedition 791 



Histology of Digestive Canal of Holothuria 792 



Studies on Cozlenterates 792 



Organization of Hydroid Polyps 793 



Hydra 794 



Vital Phenomena of Actiniae .. .. 794 



Ovaries of Aetiniat 795 



Skeleton of Madrepores 795 



Studies on Gorgoniadse 796 



Development of Alcyonaria 797 



Manual of the Sponges 797 



Development of Beniera filigrana 798 



New Fresh-water Sponges 798 



Butschl-Cs Protozoa 799 



New Ciliate Infusorian 799 



Actinophrys sol 800 



Nuclei of Lieberkuehnia .. .-. 802 



Parasitic Protozoa 803 



Intestinal Parasites of Oysters 804 



Botany. 



Structure and Movement of Protoplasm 804 



Protoplasm of Compound Laticiferous Tubes 805 



Development of the Embryo-sac 805 



Development of tke Embryo in Lupinus 807 



Homology of the Ovule 808 



Reproductive Organs of Cycadese 808 



Cell- and Nuclear Division in the Formation of the Pollen of Hemerocallis 



fulva 809 



Structure and Groicth of the Cell-icall 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 



Sphero-crystaJs 815 



Respiration of Detached Shoots 815 



Physiological Functions of the Tissues of Plants 81'! 



Chlorophyll and Hypochlorin 817 



Funrtion 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 Resinous Substances .. ., 820 



Change of Starch into Sugar at low temperatures . . 821 



Colours of Flowers 821 



Causes of the Etiolation of Plants 822 



Oriqin of Galls 823 



Male Fructification of Polytrichum S'2'A 



Epiplasm of Ascomycetes — Glycogen of Plants 824 



