412 



INDEX. 



Pascher, A., Amoeboid Variations in 

 Flagellates, 259 



— Crossing of Two Species of Chlamy- 



domonas, 260 



— New Amcebse, 258 



— Pseudopodial Network for Food-Catch- 



ing in a Chrysomonad, 260 



— Undulating Marginal Cilia in a Green 



Flagellate, 168 

 Patonillard, N., Conidial Forms of Basidio- 

 mycetes, 181 



— Myxomycete from Madagascar, 291 

 Patten, Bradley M., Reactions of Whip 



Scorpions, 40 

 Paul, D., Clathrus cancellatuB in Scotland, 



182 

 Paulson, R., Ecology of Lichens, 74, 392 

 Peacock, A. D., Mouth-parts and Mode of 



Feeding in Louse, 37 

 Pearson, A. A., 67, 283 



— New Mycena, 286 



— Two-spored Basidia, 65 



Pecker, Sophie, Influence of Blood-serum 

 on Coliidiuni colpoda, 259 



Pegler, Alice, and I. Pole Evans, Cape 

 Fungi, 68 



Pelage in Deer-mice, Moult and Regene- 

 ration of, 133 



Pelagic Eggs in Port Erin Bay in 1918, 

 Monthly Occurrence of, 134 



Pelvic Structure and Burrowing Habits, 33 



Penard, E., On FolUculina boltoni (S. 

 Kent), 193, 305 



PennatulacesB, Dorsal Mesenteric Fila- 

 ments of Siphouozoids of, 257 



Penstemon secundiflorus. Embryo-sac and 

 Embryo of, 265 



Penlatomoidea, Nearctic, 349 



Perard, Ch., 157 



Perch, Climbing, Tumours in, 32 



Peripatus capenns, 350 



Fetch, T., Ceylon Lentini, 181 



Fungi, 183 



Polypori, 181 



— Colut Gardneri (Berk.) Fischer, 2S4 

 Petersen, J. B., Danish Aerophilous Algse, 



376 



Pethybridge, G. E., Disease of Flax Seed- 

 lings, 289 



Pathybridge, G. H., Destructive Disease of 

 Seedling Trees of Thuja gigantea, 382 



— Saprophytic Speciesof Fungi associated 



with Diseased Potato Plants and 



Tubers, 284 

 Peltigeracese, Researches on, 290 

 Peziza proteana var. sparassoides in 



America, 62 

 Phseophycese, Historical Review of the, 



379 

 Phaeophycean Zoid, 378 

 Phagocytic Mononuclear Cells, Origin of, 



29 

 Phasmid, Hermaphrodite Specimen of a, 38 



Phegopteris polypodiudes, Regeneration 

 in. 56 



Phillips, Arthur, and George C. Gerner, 

 Influence of Certain Variables asso- 

 ciated with the Anneal of Cold- 

 worked Alpha Brass, 299 



Phillips, R. \V., Duration of Prothallia of 

 Ladriea Felix-mas, 269 



Phoma citricarpa McAlp., 177 



Fhoronopsis, Transverse Fission in, 148 



Phreatogammarus, 352 



Pbyllachoras from Porto Rico, 281 



Phylloglossum, Tuber of, 371 



Phyllosticta, Index to American Species 

 of, 177 



Physoderma Disease of Corn, 281 



Phytophthora Faberi Maubl., 287 



— in/estang, 62 

 Pierre, H., 183 



Pig, Coracoid of, 232 



— Heart-muscle of, 338 



Pig's Sternum, Development of, 331 

 Pigeon's Crop and Gonads. Correlation 



between, 334 

 Pigeons, Ataxic Brains of, 32 



— Hereditary Ataxia in, 32 



— Identical Female Twins in, 23 

 Piguet, Eraile, Oligochsets of the High 



Alps, 147 

 Pineapple Fungus, 380 

 Pine-needles, Significance and History of, 



159 

 Pine Seed-beds, Fungus Flora of, 65 

 Piper, C. v., and H. S. Cox, Rliyzoctonia 



on Lawns and Pastures, 186 

 Playiocliasma appendiculatum L. et L. and 



P, articiilatum Kashyap, 270 

 Planaria, Action of Potassium Cyanide in, 



255 



— aliissima. Reactions of Proboscis of, 148 

 -^ doroiocephala, Effects of Cyanides on, 



255 



— Oxygen Consumption in Feeding'and 



Starving, 355 



— Respiratory Metabolism in, 354, 355 



— Starvation in, Lack of Oxygen during, 



355 



— Starving, Carbon Dioxide Production 



in, 354 

 Plankton Bacillarise, Adriatic, 375 



— in the Lake of Geneva, 272 



— Isle of Man, Intensive Study of, 134 



— phase and Plankton-rate, 375 

 Plant Diseases, Philippine, 289, 293 



— Formations, Statistical Invefetigations 



on, 52 

 Plants, Fossil, from the Canal Zone, 266 

 Plasma, Specific, Theory of, 235 

 Plasmodiophora Bmssicx, '^92 

 Platyzoma mierophyllum R.Br., 55 

 Playfair, G. I., Fresh-water Rhizopoda of 



Sydney and Lismcre, N.SVV., 48 



— New and Rare Fresh-water Algse, 277 



