INDEX. 
751 
Piccoli, E., Spore-Formation of Bacterium 
coli commune, 845 
Piekard-Cambridge, F. C., Stridulating 
Organs of Scytodes, 61 
PieridiB, Pigments, 616 
Pig, Blastodermic Vesicle, 293 
Pintner, — ., Morphology of Proboscis in 
Tetrarhy nchi, 4 1 9 
Pigment-Granules, Grouping, during Seg- 
mentation in Frog, 176 
Pigmentation of Salamander, 611 
Pigments of Pieridae, 616 
Pike, Myxosporidia, 533 
Pilsbry, H. A., Revision of North Ame- 
rican Slugs, 615 
Pine-Leaves, Growth, 648 
Pines, Red Wood, 642 
Piorkowski, Immigration of Typhoid Ba- 
cilli into Hens’ Eggs, 348 
— Urinous Substrata for Differentiating 
Bacillus coli communis and B. typhi ab- 
dominal is, 475 
Pitfield, — Flagella Staining, 133 
Pithophora , 334 
Pizon, A., Follicle Cells in Molgula, 180 
Pizzigoni, A., Parasitic Fungi, 450 
Plagiotrupic Position of Lateral Roots, 89 
Plague, Microbes, 221 
Plancken. See Van der Plancken 
Plankton ikrit, a Centrifugal Apparatus for 
Volumetric Estimation of Food-Supply, 
470 
Planorbis, Larval Kidney, 181 
Plants, Assimilation of Elementary Nitro- 
gen and of Lecithin, 649 
— Estimation of Lieithin in, 484 
— Recording Apparatus for Study of 
Transpiration, 264 
— Sensitiveness, 652 
Plasmol^sis and Growth of Medullary 
Tissues, 439 
Plate, L. H., Collection and Preservation 
of Zoological Specimens, 257 
Plate-Cultivation Methods, Improvements, 
128 
Plateau, F., Effectiveness of a Net in ex- 
cluding Insects, 305 
Platiuum Wire Brush for Inoculating Cul- 
ture Media with Diphtherial Matter, 
250 
Platner’s Intercellular Body, 176 
Platt, J. B., Development of the Peripheral 
Nervous System of Necturus, 171 
— Thyroid Gland and Suprapcricardial 
Bodies in Necturus, 172 
Platvhelminthes. See Contents, xv 
Platypus, Embryo, 37 
Pleurococcus nimbatus, 161 
Plimmer, H. C., Microscopical Diagnosis 
of Uterine Growths, 256 
Pliocene Foraminifera, New, 195 
Plurilocular Sporanges of Asperucoccus, 92 
Plymouth Hydiv.ids, 319 
Plymouth, Parasitic Copepoda of Fish 
from, 528 
Pneumobacillus of Friedlauder, 227 
Fermentation excited by, 109 
Pneumococcus, Action of Metabolic Pro- 
ducts of Staphylococcus and, 666 
— Cultures on Blood, 473 
— Fraenkel’s, 462 
Pockets of Calcium Oxalate, 642 
Poirault, M. C., Nuclei of Uredinea), 97 
Polar Rings, Yolk-Nucleus and, 499 
Polistes, Habits, 307 
Poljanec, L., Transpiration of Potato, 209 
Pollen and Ovule, Homology, 617 
— Biology, 437 
— Formation within Ovules, 436 
Grains, 433 
Tube, Structure and Growth, 206 
Pollination, Cross- and Self-, 207, 540 
Polyclads of New Britain, 527 
Polydactylism, 610 
Polyembryony, 207 
Polymorpliina angusta, 13 
— communis, 13 
— compressa, 14 
— fusiformis , 11 
— gibba, 9 
— gutta, 10 
— luctea, 9 
— sororia, 12 
var. cnspidata, 13 
Polymorphism of Buds in Colella, 399 
— of Cladobotryum, 3 9 
Polystely in Dicotyledons, 537 
Polyzoa. See Contents, Buyozoa, xii 
Polychseta of Dinard, 414 
Pome®, Wood, 642 
Pond-Life, Cocain in Study, 258, 483 
Porcelain Cylinder, Perforated, as Washing 
Apparatus, 355 
Porcosan, Experiments with, 700 
Pore in Spore Membrane of Rust-Fungi, 
Simple Method for Demonstrating Ger- 
minal, 257 
Pores of Pulmonary Alveoli, Demonstra- 
tion, 358 
Porifera. See Contents, xvii 
Port Erin, Nemertines, 67 
Port Jackson Sharks, Egg-Cases, 295 
Portugal, Sponges from W. Coast, 77 
Postelsia, Sori, 91 
Potato Diseases, 550 
— Scab and its Cause, 451 
— Transpiration, 209 
Putouie', H., Secondary Growth in Thick- 
ness in Palms, 642 
Poulet, V., Vegetable Digestion, 652 
Poulsen, V. A., Root of Myristica, 435 
Poulton, E. B., Age of the Earth, 609 
— Courtship of certaiu Aeridiidce, 516 
Poultry, Tape-Worms, 528 
Pox, "Chicken-, Staphylococcus Pyaemia 
after, 556 
