656 



INDEX. 



Pilularia, Distribution of, 159 



Pint-. White, Growth-studies in, 269 



Pine-weevil, Braconid Parasite of, 31 



Pinna-trace in Perns, \'-> 



Pipette Method in the Isolation of Single 



Micro-or^anisins, 71 

 Pipunculids Parasitic in Homoptera, 362 

 Pirsson, L. V., Microscopical Characters 



of Volcanic Tuffs, 620 

 Piskernik, A., Protoplasmic Connexion in 



Mosses, 160 

 Pixell-Goodrich, H. L. M., Investigating 



the Life-history of the Sporozoa of 



Spatangia, 308 



— Sporozoa of Spatangoids, 379 

 Plagiochasma, 385 



Plague Bacillus, Variations in the Antigen 

 of, 291 



— Cadavers. Thermoprecipitiu Method in 



Diagnosis of, 62 

 Planaria, Head -regeneration in Pieces of. 



370 

 Planarians, Effect of Section in, 369 



— Terrestrial, from Abor Country, 369 

 Plankton, 18 



— Adriatic, 601 



— Danish Seas, 49lj 



— Diatom, Culture of, 280 



— Epiphvtes, 498 



— Mansfield Lake, 600 



— Marine, 280 



— Problems of a Modern Study of, 280 

 Plant Diseases, 170, 394, 505 



- Food Accessories, Bacterial Test for, 

 620 



— Relationships, 271 

 Plants, Diseases of, Gil 

 Plasmic Structures, 133 



Mitochondria and other, 241 



Plasmodia of Bodhamia utricularis. Culti- 

 vation of, 191 

 Platycerium, Rhizome of, 274 

 Playfair, G. I.. Trachelomonas, 602 

 Plectoguaths, Integument of, 567 

 Pleodorina illinoiensis in Britain, 600 

 Plessis, G . du, Fresh-waterHydromedusoid, 



262 

 Fleurozi/gnfloii sibiricum a Molendoa. 597 

 Plotz, H., Etiology of Typhus Fever, 616 

 Pliimecke, D., Water-bloom of Gonium 



peetorale, 279 

 Plumularian Planula, Development of, 150 

 Pocock, R. I., Facial Vibrissas of Mammals, 



19 

 Pollen, Physiology of, 591 

 Pollen-formation, 491 

 Pollinator, Tlirips as, of Beet-flowers, 253 

 Polychaets collected by tlie " Hirondelle'" 

 and " Princess Alice," 367 



— Dicystid Gregarines of, 1 55 



— Pacific. 578 



— Studies on, 147, 254 

 Polypodium, Asiatic Species of, 383 



Polypodium, marginellum and its Allies. 



' 383 

 Polyporus, Synopsis of, 609 

 Polypterus, Larval. 562 

 Polystomum, New, Structure of, 257 

 Polytrichacese, 41' I 

 Polyzoa, Australella and Allied, 371 

 Popple. E., Acroloxus lacustri^. 138 

 Porania pulvillus, Abnormal Gills of, 259 



Larva of, 484 



Porifera. See Contents 

 Portevin. A. M.. Coalescence in Steel and 

 in Alloys, 30'.t 



— Decarburization of Steels in Salt Baths, 



85 



— Mechanical Anisotropy of Metals, 310 

 Portier, M. P., Resistance to Chemical 



Agents of Certain Strains of Bacillus 

 subtilis, 614 

 Potato and Friedlaender's Bacillus, 177 



— Wart Disease. Treatment of, 290 

 Potter, A. A., Smut of Sorghum, 392 

 Potts, F. A., Atlantic Chsetopterids. 255 

 Powers, J. H., Transmission of Induced 



Characters in Asplanchna amphora, 

 483 



Prat, G.. Bohemian Algas, 500 



Prat, S., Trentepohlia annulata in Moravia. 

 499 



Prawns, Fresh-water, from Tonkin. 34 



President's Address : On Some of the 

 Micio-biological Problems of the Pre- 

 sent War, 205 



Price, S. R.. Batrachospermuin, 53 



Primordial Germ-cells of Chick, 456 



Printz, H.. Norwegian Protococcoidese, 

 167 



Prionospio, Genus, 256 



Pristina, Species of, 35 



Projection, Optic, 70 



Prokaska, K„ Moss Flora of Carinthia, 

 161 



Pronephric Duct in Elasmobranchs, De- 

 velopment of, 131 



Protective Coloration of Pupae of Pieris 

 brassirm, 573 



Proteu* vulgaris, 174 



Protocephalus ambloplitis, Life-hisiory of, 

 483 



Protoeoccoideae, Norwegian, 167 



Protodermaptera, 413 



Protomycetes of Switzerland, 501 



Protonema, Flattened, of Tetraphis. 594 



Protoplasmic Connexion in Mosses. 160 



Protozoa, Ciliate, Genetics of, 584 



— in Relation to the Factor Limiting 



Bacteriae Activity in Soil, 397 



— Parasitic, Studies on, 490 



— Soil, 615 

 Notes on, 43 



— See also Contents 



Przesmycki, A. M., Vital- Staining with 

 the Free Base of Neutral Red, 408 



