INDEX. 



823 



Planaria maculata, Life-History and Re- 

 production, 614 



Plankton, Atlantic, 526 



Plankton-Diatoms, Variations - Statistics, 

 63 



Plankton of Alt-Ausseer Lake, 199 



— of Lake Nyassa, 327 



and ' Other Mid-African Lakes, 



526 

 Plant-Anatomy, Pathological. 621 



— Cells, Action of Freezing, 508 



— Disease, Wild Plants as Nurseries. 



653 



— Diseases, Distribution, 207 



— Growth, Eelations to Ionisation, 56 



— Life, Influence of Light and Darkness, 



316 



— Microscopy, 58 



— Nutrition, Changes in Salicin, 517 

 Function of Calcium Oxalate, 515 



— Protoplasm, Functional Inertia, 191 



— Eusts, Problems in the Study, 531 



— Teratology, 5S 



— Tissues, Fresh, Sectioning, 231 



Specific Double Eefraction, 765 



Plantains, Enzyme in Eipening, 56 

 Plants, Action of Sodium Fluoride and 



Potassium Iodide and Potassium 

 Ferrocyanide, 518 

 of Uranium. 518 



— and Animals, Arsenic in, 1S6 



— Carbnretted Hydrogen and Hydrogen 



formed by, 516 



— Decomposition and Regeneration of 



Albuminoides, 317 



— Deprived of their Cotyledons,Nutrition, 



624 



— Detection of Phosphorus in, 49 



— Effect of Composition of Soil, 190 



— Green, Assimilation, 514 



— of Catalonia, 31 S 



— of Lord Howe Island, 519 



— Penetration by Bacteria, 216 



— Periodicity of Morphological Phe- 



nomena, 515 



— Physical Conditions of Tuberisation, 54 



— Synthesis of Proteids, 513 



— Wild, as Nurseries of Plant-Disease, 



653 



— Woody, Variation in Carbohydrate 



Reserves in Stem and Root, 191 



Plasmodium Preecox, 619 



Plasmopara, Fertilisation, 745 



Plate, L., Studies in Cyclostomes, 599 



Plateau, F., Poppies and Insect Visitors, 

 518 



Platinum Metals, Volatilisation and Re- 

 crystallisation, 115 



Platystrophia, Evolution, 615 



Plecnik, J., Carbon tetrachloride as a 

 Clearing Fluid, 370 



Pleospora and Helminthosporium, Rela- 

 tionship, 747 



Pleuronectids, Abnormal Coloration. 166 

 Plowman, A. B., Relations of Plant Growth 



to Ionisation. 56 

 Plowright, C. B., British Mycology, 533 

 Pneumococcus which liquefies Gelatin, 343 

 Poche, F., Correct Name of (ienus 



Phoronis, 500 

 Poche, R., Flagellate Parasites in Siphono- 



phora, 306 

 Pocock, R. I., New Clasping-Orgau in a 



Centipede, 496 

 Podar7;e obscura, Artificial Partheno- 

 genesis in Egg, 498 

 Podpera, J.. Plant-Formations and Flora 



of South Bulgaria, 57 

 Polar Bodies in Drone-Ova. History, 293 

 Polariser, Reflectins, Simple Form, 99 

 Polarising Vertical Illuminator, Improved. 



and use of Birefringence, Improved 



^Method of Identif ving Crystals in Rook 



Sections, 6S3 

 Poll, H., New Electrical Microscope Lamp, 



350 

 Pollacci. G., Assimilation in Green Plants. 

 514 



— Hydrogen and Carburetted Hydrogen 



formed by Plants. 516 

 Pollen- Grains, Germination. 53 

 Pollen in Asclepiads, Development. 53 

 Polychasta, Otocysts. 301 

 Polychsets. Fresh-water, 301 

 Polyclad, Fresh-water, 182 

 Polydesmus exitiosus and Alternari<t Bras- 



sicas, 33S 

 Polygordius, Notes, 301 

 Poh/mnia nebulosa, Role of Amoeboevtcs, 



7*24 

 Polymorphism of Marine Alga?, 636 



— of Microfungi, 209 



Polyodon folium, Lateral Canals and 



Cranial Bones, 28S 

 Polyporese, N. America. 72 

 Polyporacese of N. America, 536 

 Polysaccharides, Hydrolysis, ."'17 

 Pond Life, Exhibition, 380 



Slide, 239 



Pontiothauma Structure, 491 

 Poole, H. S., Stigmaria, 521 

 Poppies and Insect Visitors. 518 

 Porh'era hygrometrica, Anatomy and Move- 

 ments, 310 

 Porsild, 31. P., New Double-hinged Limb- 

 holder, 545 

 Porta, A., Hepatic Function in Insects, 17;'» 



— Reproduction of Acanthometridae, 45 

 Portable Microscope, New. 543 

 Portier. P., Temperature of the Tunny. 

 Potato Disease, 644 



— Diseases. 213 

 Potatoes. Experiments. 516 

 Potter, M. C. Potato Diseases. 213 



— Septoria. 337 



Powell, C, Calcareous Pebbles, 658 



