INDEX. 



999 



Pedal Nervous System of Paludina 



vivipara, 27. 

 Pedicellarife and Muscles of Sea- 



Urchin, 253. 

 Pedicellina, Metamorphosis of, 726. 

 Pelagic Animals, 22. 

 Pencils, Wide-angled, Conditions of 



Aplanatism for, 831. 

 Penetrating Power of Objectives, 831. 

 Penetration, ^;S0, 833. 

 Perception of Light and Colour, Hypo- 

 theses with regard to, 579. 

 Perfect state of Prosopistoma puncti- 



frons, 596. 

 Periodicity, Daily, in the Growth of 



Plant-Stems, 629. 

 Peri-pneumonia, Intrusion of a Fungus 



into the Pulmonary Tissue during, 



283. 

 "Periscopic" Eye-pieces, Gundlach's. 



659. 

 Perivisceral Fluid of the Echinoidea, 



251. 

 Petromyzon, Development of, 425. 

 Peziza Fuckeliana and Sclerotiorum, 



775. 



■ , Sclerotia from, 281. 



Willkommi, Larch-parasite, 85. 



Phseosporese, Sexual Eeproduction of^ 



929. 

 Phalangidse, Sexual Organs of, 447. 

 Pljalaris nodosa, Vasa propria of, 268. 

 Plianerogamia. See Contents, xviii. 

 Pheasants, Syngamus trachealis of, 



602. 

 Phoriospongia and Dysideidse, 66. 

 Phosphorescence in Organic and In- 

 organic Bodies, 581. 

 Photographing Bacteria, 851. 

 Photographs, Giinther's, of Pleuro- 



sigma angulatum, 853. 

 Photography, Micro-, 064. 

 Photometrical Questions connected 



with Aperture, 341. 



Test of Aperture, 311. 



Photomicrogi-aphs, Maddox's, of 



Pleurosigma angulatum, 715. 

 Phycochromaceffi, Genetic Connection 



of Certain Unicellular, 291. 

 Colourless, and Green Bacteriaceje, 



89 

 Phyllocladus, 922. 



Phyllotaxis, Spiral, in Floridese, 290. 

 Physical Conditinns, Influence of, on 



the Forms of Water-plants, 915. 

 Physiological iMovements, Micro- 

 scopical Kepresentation of, 864. 

 Pigment, Absorption of, by Bacteria, 



497. 

 Pigments, Red, in Plants, Action of 



Light on the Formation of, 76. 

 Pilosism in Plants, 623. 



' Pinguicula alpina an Insectivorous 

 I Plant, 272. 



and Utricularia, Crystalloids in 



! the Cell-Nuclei of, 477. 



Pinion, Spiral, and Diagonal Rack- 

 work, 518. 



Pistillaria pusilla, Vegetative Budding 

 of, 925. 



Pits, Bordered, 911. 



, Bordered, Membrane of, 71. 



Plakiriidfe, new Group of Siliceous 

 Sponges, 64. 



Planarians, Eye of, 605. 



, Germinal Layers of, 743. 



Plane Surface of a Lens, Power of, 

 332. 



Planorbis, Embryo of, 25. 



ii'lasmodium, Aggregated, Myxomy- 

 cetes with, 6.39. 



Plate, Sur-anal, Morphology of, 896. 



Platodes, Urinary Apparatus and Blood- 

 Lymph Spaces of, 893. 



Platyhelmia, Coelom and Nephridia of, 

 604. 



Platyscopic Lenses, Browning's, 939. 



Pleospora Xapi, Eape-disease, 86. 



Pleurosigma angulatum, Giinther's 

 Photographs of, 853. 



, Maddox's Photomicrographs 



of, 715. 



Pleuiotus glandulosus. Supposed Hy- 

 menial Glands of, 637. 



Plurality of Nuclei in the Siphonese, 

 96. 



Pocket Microscope, 809. 



Poison, Fowl-Cholera, Mitigation of, 

 91. 



Glands of Spiders, 39. 



Poisons, Action of certain, on Vegetable 

 Cells, 928. 



, Influence of, on Lamellibranchi- 



ata, 879. 



, Microscopic Tests for, 544. 



, Organized, Mitigation and Re- 

 newed Activity of, 498. 



Polar Globules in the Ovum of the 

 Crustacea, 42. 



Polarizing Apparatus, Murray and 

 Heatii's, 302. 



Pollen, Staining and Mounting, 

 137. 



Pollen-tube, Course of, in Augiosperms, 

 262. 



Pollexfeiiieae, Congenitul Union of 

 Growth on the Thallus of, 783. 



Polvchifetous Annelids, Development 

 of, 43. 



Polyergus lucidus, 444. 



Pulymicrotome, Hailes', 696. 



Polyporus applanatus, Douljlc Fructi- 

 fication of, 82. 



Polyj.s, Hydroid, 470. 



