Nestmaking, 65, 67, 79, 80, 82, 84, 90, 91, 102, 107-108 New generation of young women, 351-352 Newts, 85 Noguchi, 287 Nursing offspring. (_See_ Feeding offspring.) O Obsessions, 316 Offspring cared for by father. (_See_ Fathers, Devoted.) Ostrich, 103 P Parent hunger, 113-114, 214 Parental conduct. (_See_ Intelligence, Connection between caring for young.) Parental conduct dependent on the sexual appetite, 102, 221 _et seq._, 368 Parental duties, Neglect of, weakens family, 107 Parental instinct, 34, 60, 61, 62, 70, 81, 91, 94 _et seq._, 105, 106, 130, 196, 214, 221, 368 Parental instinct, Diversity of, 62, 94, 99, 132, 134 Parental instinct not fixed in the mother, 79, 89, 99-102, 130, 184, 223 Parental instinct, Strength of the, dependent on expression, 94, 135, 196 Parental sacrifice, 63, 64-65, 66, 70-73, 103 _et seq._, 106, 221 Parental sacrifice more common with mother than father, 66, 171-173, 185 Parenthood, Difference between human and pre-human, 61, 130 Parenthood, Pre-human, 34, 37, 130, 135 Parents, Bad, 107, 182-183, 221 _et seq._ Paternal instinct. (_See_ Fathers, Devoted.) Patriarchal family, 68-69, 127, 143 _et seq._, 150, 156 _et seq._, 166, 171-173, 185 Patriarchal family. (_See_ Advantages of.) 157-159, 170, 173, 185, 191 _et seq._, 203 Paul, Jean, 306 Penang, Highlanders of Sumatra, 180 Penguins, 109-114, 181 Phalaropes, 100, 102, 224 Pleasure factor in love, 221, 222 Polygamy, 154, 193-195 Polygamy connected with desire for offspring, 87, 88, 148 Polygamous fathers, 101, 108-109, 124 _et seq._, 126, 127, 133 Polygamy, Legalised, 191, 195, 213 Polyandrous mothers, 101, 133, 223 Polyandry, 154-155 Position of the father under matriarchy, 151, 191 Position of the mother under patriarchy, 171-172, 192 Primitive human family, 141-159 Problem of education. (_See_ Education.) Production, Prodigality of, 82, 123 Profligacy, 193, 202, 210, 215, 230, 281, 343 Prostitute, The natural, 221 Prostitution, 230, 239, 250, 252, 285-286, 306 Prudery, 48, 308, 357 Prurience, 308, 309, 320 Psalmist on blessings of home, 376-377 Psychological meaning of the combination of man and woman, 331-332 Pueblos of New Mexico, 180 Puritan views of sex, 218, 346 Purpose, Women’s want of, 180, 290 Pycraft, 68, 80, 82, 84, 89, 90, 92, 101, 104, 106 Python mother, 80 R Race-protecting instinct, 22 Racial duty, 102, 175, 202, 214, 262 _et seq._, 265, 285 _et seq._, 354, 374-377 Remedy, The, 351-377 Repression, Dangers of, 21, 202, 261, 317, 339, 340, 355, 373 Reptile parents, 63, 79-86 Response to life, Deadening of the, 351 _et seq._ Rodents, 129 Romance, Dangers of, for girls, 295, 338, 366 Rousseau, 306 S Sacrifice, Woman’s obligation of, 15, 129, 145, 376 Salamander parents, 85 Salzmann, 306