870 



Index 



Pleasure, definition of 616 

 Plectonema 307, 308 

 Pleurocapsa 307, 308 

 Pleurococcaceae 128, 133, 251, 308, 



335 

 Pleurococcus 70, 308 

 Podocarpus 360 

 Poisons, action of 93, 608, 609 

 Polar bodies 292 

 Polonium 3 

 Polvchaeta 389 

 Polyciliata 33-t 

 Polygordius 512 

 Poh-phagus 284 

 Pol j-p odium 385 

 Polyporus 16-1' 



Poh-protodontia 490, 494, 495, 496 

 Polj-pteridae 403 

 P0I3 siphonia 320 

 Polytheism 687, 704, 715, 717, 718, 



728, 732 

 Polyzoa 391, 515, 516, 517 

 Populus 244 

 Porifera 383 

 Porphyra 318 

 Porphyridium 318 

 Porsch 363 



Potassium in living tissues 6 

 Potomac beds 368 

 Preyer 88, 89, 90, 810 

 Price 654 

 Priestley 31 

 Primates 596, 621 

 Primitive man 702, 777 

 Proboscidea 557, 621 

 Proboscis of elephant 562, 568 

 Proboscis of Nemertinea 420, 423, 



42€, 434, 435, 451 

 Proboscis of Turbellaria 422, 427 

 Proboscis sheath, Notochord 435 

 Proenvironment, Definition 205, 629 

 Proenvironment, Law of, 174, 188, 



194, 205, 629, 676, 684, 699, 789, 



790, 831 

 Pronucleus male 279 



Prorocentraceae 310 



Prosencephalon 433, 440 



Protamoeba 271, 274 



Proteidae 462, 471 



Proteolytic ferments 158 



Proteomyxa 59, 245 



Proterospongia 383, 384 



Proteus 463 



Protobiota 38 



Protococcaceae 129, 133, 251, 256, 

 265 



Protohydra 385 



Protomycetes 51 



Protoplasm 30, 39, 50, 55, 51, 60, 61, 

 65, 72, 78, 80, 81, 84, 85, 88, 98, 

 99, 102, 103, 107, 108, 110, 114, 

 116, 132, 136, 142, 151, 165, 170, 

 222, 227, 237, 248, 259, 598, 600, 

 609, 800, 801, 802 



Protopterus 85 



Protozoa 51, 223 



Protozoa, sexuality in 271, 274, 275 



Prout 3 



Prowazek 223 



Prussic acid 157 



Pseudodifflugia 379 



Psilotum 346 



Pteridophyta 49, 258, 287, 313, 504 



Pteridospermeae 315 



Ptyalin 157 



Pulmonata 522 



Purpurin 77 



Pvrenoids 119, 309 



Pyrocystis 310 



P^Tola 202 



Quadrate bone 477, 483 

 Quercitrin 161 

 Quinary compounds 32 

 Quincke 78 

 Quinine 66 

 Quinoline 66 



Rabinowitsch 326 

 Radaisia 254, 318, 320 



