The science of life : fully illustrated in tone and line and including many diagrams
iP
Plague bacillus, 568
Plaice, 527
Planaria, 140, 145, 332, 140, 405
Planema epoea, 576
Planktomya, 514
Plankton, 124-125, 510-516; in lakes, 538; in polar seas, 548 ; in rivers, 534
Plankton-recorder, 591
Plant-animals, 172-174
Plant-body, the building of the, 401-404
Plant-bug, sex determination in the,
337
Plant-carbohydrates, 579
Plant-cells, 155, 156
Plant-lice, 583
Plant-proteins, 579
Plants, 154-166 ; and water, 582 ; aquatic, 509, 510, 511; behaviour of, 679; breeding of, 303-304 ; cells of, 155; classes of higher, 162; cycad-like, 420 ; development of, 461-465 ; distinction from animals, 154, 173, 182; earliest known land, 429 ; evolution of true flowering, 420, 432; fertilization of, 166 ; flowering, 162 ; food of, 156; growth of, 679; importance to animals, 578; individuality in, 157-158 ; invisibly small, 9; light and, 154-157, 582 ; nutrition of, 154-157, 503 ; of the ancient world, 434—436°5 organisation of, 155 ; pollination of (see Flowers) ; 3 regeneration in, 156; reproduction in, 155-166 ;_ single-celled, 173 ; Si J. GC. Bose’s experiments with, 9, 679 ; stomata of, 155 ; sunlight and, 156; variations in, 362-363
Planule, 148
Plasmodium falciparum, 627
— malarie, 627
— vivax, 627
Plato, 865
Platurus, 452
Platyhelminthes, 140
Platypus, 213,-216, 221, 237, 235
Play, biological function of, 749753 ; in man, 876
Pleistocene period, 196, 197, 198, 468, 470, 486, 492, 551, Goa, 198, 208, 471
— and recent climate, 486-492
— ice-sheet, work of, 540
Plesiadapis, 474
Plesiosaur, 114, 452, 449, 452
Plesippus, 208, 204
Pleurobrachia, 151, 151
Pliocene period, 196, 469, 486, 492, 743, 857, 198, 208, 392, 471
Pliohippus, 207, 208, 204, 208
Plover, 693
— golden, 490
— ringed, 569, 571
Plumose anemone, 151, 151
Plymouth Aquarium, 570
Pneumococcus, 654.
Pneumonia, 648, 654, 655
Podon, 595
Poisons, in 639-642
892
food, some possible,
INDEX
Poisons, produced by amphibians, 671
Polacanthus, 449, 458
Polar regions, 547
Pollan, 375
Pollen, 160; and bees, 717-718; evolution of, 430-433. See Flowers
Pollination, 158-160 ; by animals, birds, and insects, 463-465
Polyergus, 703
Polygalum, 230
Polyploidy, 363
Polyps, 149, 147, 151, 405, 406, 513, 564, 565
Polyzoa, 143; 554
Pompilius quinquenotatus, 697
Pond-life at the surface-film, 535, 534
Poplar, 271, 443, 469
Population, 873-874
Porcupine, 111
Porpoise, 111, 112
Porthesia chrysorrhcea, 682
Portugal, 491, 629
Portuguese man-of-war, 150, 520
Portunion, 226
Potamogeton, 538
Poultry, determination of sex in, 342; heredity in, 295, 297, 341-342
Prawn, 421, 527, 680, 518, 521,
524; larve of, 595 Praying mantis, 387, 736 Pregnancy, 96-97, 98; extrauterine, 92 ; influence of shock on, 312
Preservation of food, 635
Pressure at great depths, 519
Pribiloff Islands, 617
Prickly-pear, 237, 598, 611
Primary era, 197
Primates, 111, 111, 471. Apes, and Monkeys
Primitive streak, in embryo, 94
Primula, 352, 375
— sinensis, 351, 363
Prince, Morton, 798, 799; 800
Proboscidea, 110, 471
Procerodes, gamete of, 273
Progeria, 330
Projection in psychology, 819
Pronuba, 692
Propagation, artificial, 275-277
Propliopithecus, 483
Prorocentrum, 595
Prostate gland, gt, 91
Protection, by bluff, 576 =
Proteins, 48, 186; in animals of different species, 218-220
Proterozoic era, 196, 197, 410, 412, 198, 392
Proteus, 222, 551, 552
— amceba, 168
Prothallus, 162
Protocentrum, 595
Protoceras, 471
Protocrinus, 417
Protohippus, 209
Protonema, 164
Protoplasm, 28; irritability of, 664, 665 ; nerve-like condition in, 672-673 ; origin of, 395
Protozoa, 170, 271, 401, 269, 272, 515, 565, 568 - multiplication
See Man,
P—R
of, 170; 171
Przevalsky’s horse, 203
Pseudocalanus, 595
Psycho-analysis, 811-814
Psychology, and conduct, 827-838 ; comparative (See Behaviour, Mind) ; human, 787-826
Ptarmigan, Spitsbergen, 490
Pteranodon, 456, 456, 564
Pteraspis, 423
Pterichthys, 423
Pteridophyta, 163
Pteridosperm, 214, 435, 444, 420
Pterodactyl, 452, 468, 218, 456
Pterolepis, 423
Pteropods, 419, 548
Pterosaurs, 457, 456
Pterygoteuthis, 521
Ptomaine poisoning, 640
Puberty, a9
Puerperal icver, 632
Pulse, in man, 38
Pure lines, in genetics, 287-290
Puss-moth caterpillar, 576
Pycnogonids, 549, 524
Pylorus, 54
Pyramids of Egypt, composition of, 171
Pyrenees, 397, 491
Pyrosoma, 119
Pyrosomes, 514
Pyrotheres, 240, 471
Pyrotherium, 237
Python, 114
sexual process in,
Q
QUAGGA, 203, 377
Quartzite, 200
Quaternary era, 197
Queen ant, 701
Queen bee, 711, 718-719, 565, 566 Queensland, 611
Quinine, 633
R
RABBITS, I10, 237, 588, 598, 600, 606, 607 ; brain of, 733 ; digestive organs of, 505
Races, distribution of human, 239 : do they grow senile? 382; mixture of, 376, 871 ; of mankind, 863-864
Radio-active elements as geological clocks, 255
Radiolaria, 171, 178, 402, 403, 595
Radiolarian ooze, 171
Radium, 255
Radula, 418
Rafflesia, 463,
Ragweed, 587
Rag-worm, 138
557, 564
Rana. See Frog Rat, 110, 605, 628, 630, 744; black, 364, 3775 370; brown,
364-365, 377; hooded, 370; 371, ; /0; and plague, 605, 628 Rat-f>2, 596, 628 Rat? ailisation, in psychology, 795 Rattle nake, 114. Raven, 748, 750 Ray, 116 Ray leigh, Lord (1842-1919), 25