INDEX 



543 



PAGE 



Organs of out-reach 438 



Origin of species 277 



Orthogenesis 281, 507 



Outgo 91 



Outlook 509, 511 



Ovary 122, 162, 1 88 



Overspecialization 282 



Oviducts 189, 215 



Ovule 8, 150 



Ovule case 8 



Ovum 112 



Palaeontology 246, 260, 



Palatine teeth 



Palpus 



Pancreas 186, 198, 



Pandorina 



Parallelism 



Paralysis 



Paramoecium .72,111,439, 



Parasite 45. 5. 252, 263, 



Parasitic protozoans 



Parasitism 



Parenchyma 120, 



Parthenogenesis . .304, 306, 



Pasteur . 



Pasteur's Solution 



Pastoral stage 



Pectinatella 



Penicillium 



Pennaria 



Pentstemon 



Perianth 



Peristome 



Peritoneum 



Perla 



Persistence of the un- 

 specialized 



Petals 



Phagocytes 



Pharynx 165, 183, 



Philodina 378, 



Phloem 134, 



Phlox 



Phylloxera 



Phylogenetic adaptation . . 



Phylogeny 236, 



Phylum 



Physical basis of racial soli- 

 darity 



492 



183 

 18 



443 

 107 

 287 

 466 

 469 

 356 

 U3 

 39 6 

 132 



339 

 93 

 93 



496 



335 



95 



359 



253 



ii 



78 

 X 74 

 244 



250 

 7~9 

 35o 

 197 



379 

 *45 

 26 

 362 

 4i5 

 255 

 236 



320 



Physcia 393 



Physiographic barriers ... 285 



Pickling 98 



Pike 275 



Pine 149 



Pineal body 198, 200 



Pistachia 367 



Pistil 9 



Pituitary body 200 



Pith 145 



Pitted vessels 146 



Placenta 215 



Planarian 354, 523 



Plankton net 521 



Plasticity 264 



Plasmodium 101 



Play 499 



Plover 426 



Pocket gall 40 



Polar bodies 297 



Polarity 359 



Pollen 7,9,21,402 



Pollen basket 23 



Pollen distribution 400 



Pollen sacs 149 



Pollen tube 9, 150, 153 



Pollination 402 



Polyembryony 337 



Pond animals 386 



Pond life 385 



Pond snails 523 



Pons 463 



Pores 1 20 



Post-embryonic develop- 

 ment 343 



Potato 7, 361 



Potential energy 84 



Pouched mammals 242 



Prairie 6 



Precava 188 



Preserves 98 



Pride of ancestry 321 



Primary differentiation . . 219 



Primary food of animals . 3 



Primary germ layers 171 



Primates 485 



Primitive haunts 251 



Proboscides 19 



Process of evolution 266 



Progress in regression .... 263 



