CONTENTS. XVH 



PAGE 



Parasitic Peridinian . . . . . . . . • . Part 5 759 



Observations on Flagellata „ 759 



Geometry of Radiolaria .. „ 759 



Polythalamian from a Saline Pond „ 760 



Nuclear Division in Actinosphmrium eichhornii „ 761 



Parasite of the Wall of the Intestine of the Horse .. .. „ 762 



Sutherlandshire ^' Eozoon " ,, 763 



Nuclei of Infusoria Part 6 905 



New Infusorian — Ctedoctema acanthocrypta „ 905 



New Fresh-water Infusoria „ 907 



Life-history of Stentor cceruleus „ 907 



New BMzopods and Vorticellm ,» 908 



' Challenger ' Foraminifera „ 909 



Copulation in Difflugia globulosa ..^ „ 911 



Development of Stylorhynchus longicollis „ 912 



Flagellated Organisms in Blood of Animals .. .. .. „ 913 



Parasitic Proteromonadidoe „ 913 



Bacterioidomonas sporifera „ 934 



Influence of Gravitation on the Movements of Chlamy- 



domonas and Euglena ,, 938 



BOTANY. 



.—General, including Embryology and Histology of the Phanerogamia, 



Relcdions of Protoplasm and Cell-wall in the Vegetable Cell. Part 1 75 



Intercellular Connection of Protoplasts „ 76 



Polyembryony of Trifolium pratense „ 76 



Mechanical Structure of Pollen-grains 76 



Fertilization of Philodendron „ 77 



Fertilization of the Prickly Pear 77 



Annual Development of Bast .. ., „ 77 



Lenticels and the mode of their replacement in some woody 



tissues » 78 



Gum-cells of Cereals .. .. „ 78 



Nucleus in Amylaceous Wood-cells . . . . „ 79 



Peculiar Stomata in Coniferce „ 79 



Root-hairs >> 79 



Sieve-tubes of Cucurbita „ 81 



Spines of the AurantiacecB „ 81 



Tubers of Myrmecodia echinata , 81 



Chlnrophyll-grains, their Chemical, Morphological, and 



Biological Nature ». 81 



Mechanism of the Splitting of Legumes „ 82 



Aerial Vegetative Organs of Orchidece in relation to their 



Habitat and Climate „ 83 



Assimilation of Carbonic Acid by Protoplasm which does 



not contain Chlorophyll ■,■> 83 



Artificial Influences on Internal Causes of Growth .... „ 83 



Absorption of Food by the Leaves of Drosera „ 83 



Mechanical Action of Light on Plants „ 84 



Action of the Amount of Heat and of Maximum Tem- 

 perature on the Opening of Flowers n 85 



Ser. 2.— Vol. IV. & 



