544 



GENERAL BIOLOGY 



PAGE 



Progressive development 245 



Projection fibers 463 



Pronephric duct 206 



Pronephros 204 



Prophase 294 



Prostomium 163 



Proteins 83, 86 



Prothallium 129, 138, 153 



Protoplasm, 57, 59, 88, 101, 151, 



218, 290, 299,435 



Protozoa. . 68, 105, 221, 437, 441 



Psephenus lecontei 244 



Pseudo-navicellae 115 



Pseudopodia 71, 103, 438 



Psocid wings , 230 



Psychic phenomena 436 



Psychic states 434> 437 



Psyllidae 43 



Pteridophytes , 128 



Pteris 129 



Pulmonary circulation ... 202 



Pupa 344, 347, 352, 362 



Pylorus 185 



Pyrenoids 62 



Quadrumana 485 



Quercus macrocarpa 45 



Race feeling 286 



Racial differentiation .... 320 



Racial improvement 328 



Radial symmetry 288 



Radiant energy 84 



Rag weed 268 



Rag weed seeds 269 



Reaping machines 257. 



Recapitulation 265 



Receptacle 122 



Receptors 436,441,445 



Recessive characters 310 



Reflex arc 450 



Reflex response 457 



Refraction . 515 



Regeneration 353, 356, 363 



Regeneration in cells .... 357 



Regenerative cells 351 



Regressive development . 251 



Reindeer moss . 391 



Relations between ants and 



aphids 47 



PAGE 



Reproduction . . . . 109, 289, 329 



Reproductive cells 122 



Reproductive methods ... 338 

 Reproductive organs . . 167, 188 



Resemblance 423 



Reserve potentialities .... 363 

 Respiration aquatic ..... 213 



Retrogression 283 



Robber fly 429 



Rhizoids 119, 120 



Rhizome 131, 136 



Rhus glabra 37 



Riccia .... 124 



Root 130 



Root louse 53 



Root tubercles 99 



Rotifers -339> 378 



Sacculina . 397 



Salamander ..179,255,460,487 



Sandpiper 323 



Savages 497 



Scenodesmus 66 



Schultze 89 



Scion 360 



Scouring-rush .......... 137 



Scroll gall 40 



Sea urchin egg 291,357 



Secondary circuits 454 



Secretin 443 



Secretions 59, 87, 443 



Seed 148, 151 



Seedlings 278 



Seed plants 142, 152 



Seers . 509 



Segmentation cavity .... 170 



Segments 17,231 



Segregation 283, 33 1 



Selaginella 138 



Selection 339 



Self pollination 10 



Senescence 329 



Sense organs . . . 444 



Sepals 9 



Sepedon 408 



Septa 165, 171 



Sequences of activities ... 473 

 Serial homology . .225, 230, 234 



Seta 164 



Sex cells 167, 290 



