Germinal disk. layers, the. scheme of the. spot, the. vesicle, the. Germinative area, the. Giant gorilla, the. Gibbon, the. Gill-clefts and arches. formation of the. Gill-crate, the. Gills, disappearance of the. Gloeocapsa. Gnathostoma. Goethe as an evolutionist. Goitre. Gonads, the. formation of the. Gonidia. Gonochorism, beginning of. Gonoducts. Gonotomes. Goodsir. Gorilla, the. Graafian follicles, the. Gregarinae. Gullet-ganglion, the. Gut, evolution of the. Gyrini. Gynecomastism. Hag-fish, the. Hair, evolution of the. on the human embryo and infant. Hair, restriction of, by sexual selection. Haliphysema. Halisauria. Haller, Albrecht. Halosphaera viridis. Hand, evolution of the. of the ape and man. Hapalidae. Harderian gland, the. Hare-lip. Harrison, Granville. Hartmann. Harvey. Hatschek. Hatteria. Head-cavity, the. Head-plates, the. Heart, development of the. of the ascidia. position of the. Helmholtz. Helminthes. Hepatic gut, the. Heredity, nature of. Hermaphrodism. Hertwig. Hesperopitheca. His, W. Histogeny. History of Creation. Holoblastic ova. Homoeosaurus. Homology of the germinal layers. Hoof, evolution of the. Hunterian ligament, the. Huxleian law, the. Huxley, T.H. Hydra, the. Hydrostatic apparatus in the fish. Hylobates. Hylodes Martinicensis. Hyoid bone, the. Hypermastism. Hyperthelism. Hypoblast. Hypobranchial groove, the. Hypodermis, the. Hypopsodina. Hyposoma, the. Hyposomites. Hypospadia. Ichthydina. Ichthyophis glutinosa. Ictopsida. Ileum, the. Immortality, Aristotle on. Immortality of the soul. Impregnation-rise, the. Indecidua. Indo-Germanic languages. Induction and deduction. Inheritance of acquired characters. Insects, intelligence of. Interamniotic cavity, the. Intestines, the. Invagination. Iris, the. Jacchus. Java, ape-man of. Jaws, evolution of the. Jurassic strata. Kant, dualism of. Kelvin, Lord, on the origin of life. Kidneys, the. formation of the. Klaatsch. Kolliker. Kowalevsky. Labia, the. Labyrinth, the. Lachrymal glands. Lamarck, J. theories of. Lamprey, the. ova of the. Lancelet, the. description of the. Languages, evolution of. Lanugo of the embryo. Larynx, the. evolution of the. Latebra, the. Lateral plates, the. Laurentian strata. Lecithoma, the. Leg, evolution of the. structure of the. Lemuravida. Lemurogona. Lemurs, the. Lepidosiren. Leucocytes. Life, age of. Limbs, evolution of the. Limiting furrow, the. Linin. Liver, the. Long-nosed ape, the. Love, importance of in nature. Lungs, the. evolution of the. Lyell, Sir C. Lymphatic vessels, the. Lymph-cells, the. Macrogonidion. Macrospores. Magosphaera planula. Male womb, the. Mallochorion, the. Mallotheria. Malpighian capsules. Mammal, characters of the. gastrulation of the. Mammals, unity of the. Mammary glands, the. Man and the ape, relation of. origin of. Man's Place in Nature. Mantle, the. Mantle-folds, the.