Intellectual differences between men and women, 242 Jäger on heredity, 41, 45, 85 Kipp on parthenogenesis, 59 Latent transmission of sexual Leckey on male and female Leptodora, parthenogenesis in, Leydig on rotifera, 171 Lion, hybrid from with tiger, Lizards, sexual differences in, Lyell on variation of dog, 150 Lubbock on parthenogenesis, Male cell, discovery of, 21 Male fish originally varied, Male more modified than fe- male, 170 Manx cat, hybrid from, 128 Man, sexual differences in, 204 Mice, hybrid, 131 Mill on subjection of women, Mirabilis, variation in, 120, 121 Rotifera, 66, 171 Ruminants, 206 Saltatory evolution, 83, 157, 296 Saphirrina, 176 Sassafras in Europe, 90 Schäffer on parthenogenesis, 56 Sea urchin, 66 Secondary sexual characters, Semper on Lymnaeus, 92 Sexual differences in Agrion, 239 Alcippe, 183 anchorella, 179 argonauta, 237 arthropoda, 173 barnacles, 179, 181 beetles, 191 branchippus, 173 cladocera, 175 copepoda, 176, 177 crayfish, 188 cryptophyalus, 183 cyclops, 175 gelassimus, 189 ibla, 182 insects, 188, 236 locustidæ, 188 |