Notes and Memoranda — continued. page 



Parasitism of Notommaia on Vaticheria . . .. • 291 



Kidney of the Frcsh-icater Crayfish 291 



Action of the Heart of the Crayfish . . . . 292 



Natural Classification of the Spiders 293 



Researches into the Developmental Hidory of the Spiders 294 



New Genus of the Cheliferidx 295 



Neto Arari)ia .. .. •. 295 



Organization of Myriapoda 295 



Polyxe7ius lagurus, De Geer 296 



Parthenogenesis in Bees 297 



Spinning Glands of the Silkworm 297 



Odoriferous Cells in Lepidoptera 298 



Seasonal Dimorphism of Lepidoptera 298 



Development of Podurella 299 



Pespiratory Organs of the Larva of Culex 299 



SucMng Plate of Dytiscus 300 



Development of Polyzoa 300 



Presence of a Segmental Organ in the Endoproct Polyzoa 301 



Power of Locomotioji in the Tunicaia 302 



Extension of the coiled Amts in Rhy7ichonella 302 



Ene of the Lamellihranchiata 303 



Foot of the Unionidse 303 



" Digger " Mollusc and its Parasites 303 



Hermaphroditism in, and the Spermatophores of the Nephropneuslous 



Gasteropoda 304 



Mucous Threads of Limax 304 



Development of the Embryonal Sac 305 



Piotein-cristalloids 306 



Composition of Chlorophiill 306 



Action of Light and Heat on Swarmspores (Zoospores) 307 



Floating Akfas forming Scum on the Surface of Water 310 



Luminous Bacteria in Meat 310 



Thuret and BorTiet'e ^ Phycological Studies' 311 



Relation of Lichens to Alga} and Fu7igi 311 



Influence of Light on Fungi 314 



Spores on the upper side of the Pileiis in Hymenomycetes 314 



Change of Colour in tlie Spores of Fungi 315 



Fungi found within the Shell of the Egg 315 



Fungi parasitic on the Cabbage 315 



Fungus Disease in Lettuces {Peronospora ganglitformis) 316 



Fungi of Stalactites 316 



Conidial Fructifi^atiofi of Fumago 316 



Homology of the ^^ Nucule" of Characeas 317 



Arrangement of the CtUs in the flat Prothall'a of Ferns 317 



Apogamous Ferns and the Phenomenon of Apogamy in general .. . . 317 



Apogamy in Isoetes 319 



Microscopes with Swinging Tailpiece 320 



^^ Penetration" of Wide-avghd Objectives 322 



Process for Measaring the Solid Angles of Microscopic Crystals 323 



Method of Isohling the Connectioe-Tissue Bundles of the Skin 323 



: Process for Preparing tlie Embryos of Fishes 825 



Improvement in Aerating Apxiuratus of Sea-water Aquaria ..' .. .. 326 



Further Improvements in studying the Optical Characters of Minerals . . 326 



Imprr/ved Achi omatic Condenser 328 



Seller's Mechanical Microtome 328 



Size of Histological Preparations 329 



'■' Microscopy " and '^ Microscopical " Societies 329 



Oil-Immersion Objectives 331 



Method of Preserving Infusoria, &c 331 



Mixture of Oils for Homogeneous-Immersion Objectives 332 



New Fluids for Homogeneous Immersion 332 



Standard Micrometers 332 



Unit of Micrometry 332 



Obituary .. .. .. .. .. ,. ,. .. .. 333 



Bibliography .. .. .. .. .. ,. ,. ,. 335 



Proceedings of the Society .. .. ,. .. ,. ., 341 



