INDEX 



789 



Osmundca 39G, 406 



Ostrea 562 



Ostrich 25, 707, 708 



Ostwald, Wilhelm 44, 131, 426; 



Wolfgang 32, 77, 82, 132, 277, 281 

 Otoliths 425, 432 

 Ovis Amnion 614 



Owen, Sir R. 20, 575, 654, 669, 715 

 Ox, cannon-bone of 730,738; growth 



of 102 

 Oxalate, calcium 412, 434 



Palaecchinus 663 



Palm 624 



Pander, C. H. 55 



Pangenesis 44, 157 



Papillon, Fernand 10 



Pappus of Alexandria 328 



Parabolic girder 693, 696 



Parahippus 767 



Paralomis 744 



Paraphyses of mosses 351 



Parastichies 640, 641 



Passitiora, pollen of 396 



Pasteur, L. 416 



Patella 561 



Pauh, W. 211, 434 



Pearl, Raymond 90, 97, 654 



Pearls 425, 431 



Pearson, Karl 36, 78 



Peas, growth of 112 



Pectcn 562 



Peddle, W. 182, 272, 344, 448 



Pellia, spore of 302 



Pelseneer, P. 570 



Pendulum 30 



Peneroplis 606 



Percentage-curves, Minot's 72 



PericUne 360 



Periploca, pollen of 396 



Peristome 239 



Permeability, magnetic 177, 182 



Perrin, J. 43, 46 



Peter, Karl 117 



Pettigrew, J. B. 490 



Pfeffer, W. 111. 273, 688 



Ptiiiger, E. 680 



Phagocytosis 211 



Phascum 408 



Phase of curve 68, 81, etc. 



Phasianella 557, 559 



Phatnas2:)is 482 



Phillipsastraea 327 



Philolaus 779 



Pholas 561 



Phormosonia 664 



Phractaspis 484 



Phvllotaxis 635 



Phvlogeny 196, 251, 548, 716 



Pike, F. H. 110 



Pileopsis 555 



Pinacoceras 584 



Pithecanthropus 772 



Pith of rush 335 



Plaice 98, 105, 117, 432, 710, 774 



Planorbis 539, 547, 5.54, 557, 559 



Plateau, F. 30, 232; J. A. F. 192, 212, 



218, 239, 275, 297, 374, 477 

 Plato 2,478,720; Platonic bodies 478 

 Plesiosaurs 755 

 Pleurocarpus 289 

 Pleuropus 573 

 Plcurotomaria 557 

 Plumulariidae 747 

 Plutcus larva 392, 415 

 Podocoryne 342 

 Poincare, H. 134 

 Poiscuille, J. L. M. 669 

 Polar bodies 179; furrow 310, 340 

 Polarised light 418 

 Polarity, morphological 1(>(), 168, 246, 



265, 284 

 Pollen 396, 399 

 Polyhahte 433 

 Polyprion 749, 776 

 Polyspermy 193 

 Polytrichum 355 

 Pomacanthus 749 

 Popoff, M. 286 

 Potamides 554 

 Potassium, in living cells 288 

 Potential energy 208, 294, 601, etc. 

 Potter's wheel 238 

 Potts, R. 126 

 Pouchet, G. 415 

 Poulton, E. B. 670 

 Poynting, J. H. 235 

 Precocious segregation 348 

 Preformation 54, 159 

 Prenant, A. 163, 164, 189, 286, 289 

 Prevost, Pierre 18 

 Pringsheim, N. 377 

 Probabilities, theory of 61 

 Productus 567 

 Protective colouration 671 

 Protococcus 59, 300, 410 

 Protoconch 531 

 Protohippus 767 

 Protoplasfti, structure of 172 

 Przibram, Hans 16, 82, 107, 149, 204, 



211, 418, .595; Karl 46 

 Psammobia 564 

 Pseuopriacanthus 749 

 Pteranodon 756 

 Pteris, antheridia of 409 

 Pteropods of 258, 570 

 Pulvinulina 514, 595, 600, 602 

 Pupa 530, 549, 556 

 Piittcr, A. 110, 211, 492 

 Pyrosoma, egg of 377 



50—3 



