6i4 



EVOLUTION, GENETICS, AND EUGENICS 



Orr, H. B., 523 



Orthogenesis, 33-36, 282 



Orthoplasy, 277 



Osborn, H. F., 8, lo-ii, 13, 20-21, 45, 



158-59, 161, 165-66, 211-14, 282, 



284-92 



Overspecializations, 31 



Ovum, 113 



Owen, R., 87, 105, 249 



Pagiiriis bernhardus, 76 

 Palaeomastodon, 147-49 



Palaeontology, evidences from, 60; opin- 

 ions as to the adequacy of, 133-34; 

 strength and weakness of, 132-33 



Palingenetic, 123 



Pan vetus, 159 



Pangenesis, 28, 30 



Panmixia, 31, 272-73 



Panniculus carnosis, 85-86 



Papilio machaon, 331 



Paramecium, 442 



Parasitism, as adaptation, 201-2 



Parthenogenesis: diploid, 401-2; hap- 

 loid, 402; as a method of asexual de- 

 velopment, 112; sex determination in 

 connection with, 401-2 



Pavlov, I. P., 473 



Pearson, K., 43, 430, 436, 438, 450, 558, 

 562, 564, 566 



Pedigree: of brachydactylism, 518; of 

 cataract, 519; of Charles the Great of 

 Sweden, 529; of feeble-mindedness, 

 521-22; of Ferdinand and Isabella, 

 526; of Hohenzollerns of Prussia, 

 528; of insanity, epilepsy, etc., 523; 

 of Romanoils of Russia, 525 



Peneus polimirium, 119-20 

 Phaseolus, 441 

 Phenotype, 349, 390, 442-44 

 Phenotypic, 349, 390, 442-44 

 Phillips, J. C, 459-60 

 Phocochaerus, 450-51 

 Phylaxerans, 401 

 Physiological units, 28 



Pisum quadratmn, 340; P. saccharatum, 

 340; P. sativum, 352; P. umbellatum, 

 340 



Pithecanthropus er edits, 157-61, 164 



Placenta, 201 



Plane tesimal hjqjothesis, 57 



Plate, L., 273-74, 436 



PHny, 14 



Pliohippus, 143 



Ploetz, A., 562-64 



Podocoryne, 255 



Poebrotherium, 143-46 



Polar bodies, 313-15 



Polyploidy, 493-94, 5°? 



Popenoe, P., 557-69 



Post-Aristotelians, 14 



Poulton, E. B., 266 



Poultry, sex-linked heredity in, 413-14 



Preformation doctrine, 125 



Prenatal influences, 13-14 



Presence and absence hypothesis, 372- 



73, 394 

 Primates: geologic record of, 153; origin 



of, 152-53; place of origin, 152; stock 



of, 152; time of origin of, 152 

 Primula kewensis, 494; P. sinensis, S33< 



353 

 Priority, law of, loi 

 Probable error, 433 

 Procamelus, 145-46 

 Promise of race culture, 581-92 

 Pronucleus: male, 315; female, 316 

 Protective resemblance, 205-11 

 Protohippus, 143 

 Protylopus, 145-46 

 Pterodactyl, wing of, 71 

 Punnett, R. C, 344, 354, 355 

 Pure lines, heredity in, 441-44 

 Purity of gametes, 345-46 

 Python, hind limbs of, 78-79 



Quadrumana, 85-87 



Rabl, C, IIS 



Race culture and human variety, 588-89 

 Rana sylvatica, 459; R. palustris, 459 

 Recapitulation, doctrine of, 60, 120-21; 



critique of, 122-30 

 Recombination, Mendel's law of, 393-94 

 Reduction divisions in maturation, 



364-65 

 Reighard, J., 208 

 Remora, 203 

 Renner, 496 



Reproductive processes, 499-502 

 Reversion, 13 



