132 



THE SMALLEST LIVING THINGS 



Phytomastigoda (fi"t6-mas"ti-g6'da) ; 

 classification of, 48 



Phytomonadida (fi"to-m6n-a-did'a), 48, 

 49 



Pian (pi-an') : cause, 27 



Plankton (plank'ton) : defined, 62 



Plant flagellates : see Flagellates, Plant 



Plants : algae, 47 ; biological classifica- 

 tion, 2, 40 ; characteristics, 43 ; chro- 

 mosomes, 33 ; classification based on 

 derived organizations, 39 ; color-deter- 

 mining factors, 45 ; complexity of gene 

 associations, 41 ; confused with ani- 

 mals, 42; dependent upon nitrogen, 

 20; difference between higher and 

 lower forms, 9, 10 ; evolution, S3 ; food 

 for animals, 45 ; food of saprophytic, 

 19; fossil, 6; in the nitrogen cycle, 

 20*; miscroscopic, 47; motile organs, 

 44; motile phase, 45; origin of higher 

 forms, 8; organization, 34; palmella 

 phase, 44 ; perform life processes, 31 ; 

 potential of evolution, 8; start from 

 single cells, 38; see also Protophyta 



Plasmodium (plaz-mo'dT-um), 104 



Pleodorina californica (ple"6-d6-rln'a 

 kaT'i-for-ni'ca), 56* 



Pneumonia : cause of, 19 



Poisons : resistance to, 101 



Polygastrica (p61"T-gas'trTk-a), 98 



Polypeptids (p61"i-pep'tlds) : how 

 formed, 20 



Polystomella crispa (p51"T-sto-meTa 

 kris'pa), 77* 



Porospora (p6"r6-spor'a), 71 



Potassium : in protoplasm, 33 



Potatoes : mosaic disease, 15 



Potential of evolution, 8 



Poteriodendron petiolatum (po-te'ri-6- 

 den'dron pet"i-6-lat'um), 75* 



Proteins : decomposition aided by bac- 

 teria, 19; in protoplasm, 32, 33; see 

 also Nutrition 



Protista (pro-tTs'ta) : defined, 42 



Protistology (pr6"tis-t61'o-ji) : defined, 

 42 



Protophyta (pro"to-fi'ta) : description 

 of, 47 ; organization, 41 ; Ceratium tri- 

 pos, 66* ; Closterium, 59* ; Euglena 

 gracilis, 68*; Gonium pectorale, 51*, 

 57* ; Gonyaulax apiculata, 67* ; Haplo- 

 zoon clymenellae, 53* ; Hyalobryon 

 deformans, 52* ; Hydrurus foetidus, 

 50*; Peranema trichophora, 69*; 

 Pleodorina californica, 56* ; Scene- 

 desmus, 58* ; Sphaerella lacustris, 54* ; 

 Spondylomorum quarternarium, 56* ; 

 Stephanosphaera pluvialis, 56* ; Synu- 



ra uvella, 61*; Uroglenopsis ameri- 

 cana, 51*; volvox colonies, 55*; Xan- 

 thidium armatum, 59*; 

 Protoplasm: defined, 31 ; adaptation, 39; 

 age of, 8; chemical constituents, 8; 

 contained in cells, 9; density, 32; de- 

 pends upon nitrogen, 20; derived or- 

 ganization, 38 ; effect of heat and cold, 

 39; encystment, 35; irritability, 39, 

 102; is life, 7; nature of, 32; organ- 

 ization, 34; possible origin of, 7; 

 typical cell, 31 ; vitality, 34 

 Protozoa (pr6"t6-zo'a) : assimilation of 

 food, 96 ; continuous feeders, 93 ; .de- 

 pendent on bacteria, 22; digestion of 

 food, 96; effect of starvation, 89*; en- 

 cystment, 86; first appearance, 5; 

 flagellates, 71 ; food getting, 92, 94*, 

 95* ; fossil, 6 ; functional activities, 

 88 ; hi need of a doctor, 99* ; in scum- 

 covered pools, 42 ; lack potential of 

 evolution, 8; maturity, 114; number 

 of, 71 ; occasional feeders, 94 ; organ- 

 ization, 41; palmella phase, 44; para- 

 sitism, 101 ; periodic reorganization, 

 110; potential immortality, 111; re- 

 production, 74, 78, 82, 83 ; speed of 

 movement, 70 ; table manners, 97* ; 

 types, 70; vitality, 112; Actinobolus 

 radians, 95* ; Adelea ovata, 105* ; Au- 

 tographis, 79*; bell-animalcules, 13*; 

 Collodictyon, 71* ; Colpidium colpoda, 

 97* ; Didinium nasutum, 36*, 97* ; 

 Dileptus gigas, 89* ; Diplodinium 

 ecaudatum, 10* ; Eimeria schubergi, 

 107*, 108*. 109* ; Epistylis umbellaria, 

 84* ; Euplotes patella, 82*, 83* ; Fron- 

 tonia leucas, 81*; Haemogregarina 

 stepanowi, 106*; Infusoria, 80; Liono- 

 tus fasciola, 97* ; Paramecium cauda- 

 tum, 97*, 99* ; Polystomella crispa, 

 77*; radiolaria, 77; rhizopods, 76; 

 Sarcodina, 76; Sporozoa, 105; Tricho- 

 nympha campanula, 102, 103* ; Trypa- 

 nosoma gambiense, 74* ; Spathidium 

 spathula, 97* ; Uroleptus halseyi, 37* ; 

 Uroleptus mobilis, 35*, 84*, 85*; Vor- 

 ticella campanula, 13* 

 Prowazekia (pr6-va-zek'i-a), 74 

 Pseudopodia (su"d6-po'di-a), 72, 76 

 Psittacosis (sTt"a-ko'sis) : cause of, 15 

 Ptomaine poisoning : how caused, 19 

 Pulmonary tuberculosis : cause of, 19 

 Pyrenoids (pi-re'noids), 31, 59* 

 Quadrula (kw6d'roo-la), 76 

 Quinine: resistance to, 102 

 Rabbit: parasite of, 107*, 108*, 109* 

 Rabies : cause of, 15 



