354 



Index 



Internal secretions, effects of, 224 



Intersexes, 166 



Intra-cellular pangenesis, 199 



INVERSE SYMMETRY, 191, 193, 194, 195 



Irritability, 9 



ISOLATION OF SUBSTANCES IN CELLS, 



201 



in protozoa, 201 



JAMES, WILLIAM, 315 

 JENNINGS, action of selection, on 

 Paramecium, 255 



on Difflugia, 257 



behavior of Paramecium, 47 



behavior of Stentor, 50 



inheritance of size in Parame- 

 cium, 67 



on Galton's law, 80 



on potential personalities, 316 



rapid breeding of Paramecium, 



"5 



training of star-fish, 51 

 JEROME, ST., 33 



Jews, mixture with Gentiles, 284 

 JOHANNSEN, action of selection, 255 



genotype and phenotype, 127 



inherited weight of seeds, 66 



"pure lines," 255, 257 

 JOHNSON, marriages of college wo- 

 men, 291 



KAMMERER, effects of colored soil on 

 salamanders, 236 



KEIBEL, development of human em- 

 bryo, 27, 28, 30 



Keratosis, 117 



KING, modification of sex ratio, 165 



KORSCHELT and HEIDER, Symmetry 

 of egg of Musca, /pi 



LANE, development of vision, 31 

 LAMARCK, on inheritance of acquired 



characters, 227 



LAMARCKIAN HYPOTHESIS, 235 

 Lamarckism, 32 

 LANG, snail hybrids, 105 

 Laws on Eugenics, 286 

 Learning by experience, 49, 312 

 Left-handedness, inheritance of, 68 

 Lens, cataract, 66, 118 



development of, 225 



displaced, 118 



weight of, 66 



LEPTINOTARSA, selection in, 255 

 Lethal factors, 104 



sex-linked, 185 

 Life, artificial production of, 206, 207 



conditions limited, 306 



definition of, 6 



maze of, 311 

 LILLIE, on fertilizin, 170 



on "free martin," 167 



sex determination, 167 

 Limbs, transplanted, 226 

 LINCOLN, 288 



LINKAGE OF CHARACTERS, 180 

 LOCALIZATION OF PATTERN, 192 



in eggs of ctenophore, flat-worm, 

 echinoderm, annelid-mollusk, 

 chordate, 796 

 Localization of substances in cells, 



142 

 LOEB, J. Artificial parthenogenesis, 



134, 169 



reflexes, 39 



tropisms, 43 



Logic, as test of truth, 305 

 LOLIGO, symmetry of the egg, 191 

 Longevity inherited, 68 

 LOTSY, source of variations, 261, 263 

 LOWELL, BIGLOW PAPERS, 227 

 Luxury, cause of infertility, 295 



in education, 317, 318 



MACFARLANE, on Dionaea, 44 

 McCLENDON, production of one-eyed 



monsters, 169 

 McCLUNG, on sex determination, 158, 



177 



on mammalian chromosomes, 161 

 McCRACKEN, maternal inheritance, 



112 



McDoucAL, influence of chemicals on 



ovules, 210 

 MACDOWELL, size in rabbits, no 



Selection in Drosophila, 257 

 MCGREGOR, Restoration of Pithecan- 

 thropus skull, 271 

 Male babies, greater mortality, 166 

 MALTHUS, theory of, 285 

 Man, controls destiny, 272 



dominant races of, 273, 274 



evolution of, 270 



extermination of, 274 



extinct types of, 271 



