212 



INDEX AND GLOSSARY. 



Genus, xiv. 



Geographical distribution of ani- 

 mals, 154. 



Geological succession of animals, 

 182. 



Germ, the earliest manifestation of 

 the embryo, 18, 111. 



Germinative disc, 111 ; vesicle, 104 ; 

 dot, 104, 108. 



Gestation, the period of carrying 

 youiiir, 106. 



Gi'lls, 7, 94. 



Glacial period, 204. 



Glands, 100 ; salivary, 100. 



Globules of chyle, 76 ; of blood, 86. 



Glottis, 41. 



Grallatores, birds with long legs for 

 wading, xvi. 



Grand-nurses of Cercaria, 131. 



Granivorous, birds feeding on grain. 



Grit, coarse sandstone, 184. 



Hamites, 200. 



Harmony of organs, 82. 



Harpes, 193. 



Hearing, 31. 



Heart, 89. 



Herbivora, animals feeding on grass 

 and leaves, xvi. 



Hibernation, torpid state of animals 

 during winter, 97. 



Hippurites, 201. 



Holothurians, soft sea-slugs, biche- 

 le-mar, xviii. 



Homology, 6. 



Humerus", the shoulder-bone, 69. 



Hyaline matter, pure, like glass, 15. 



Hydra, egg of, 104 ; propagation of, 

 125, 127. 



Hydrogen, a gas which is the princi- 

 pal constituent of water, 17. 



Hydroids, a family of polyps, xix. 



Ichthyosaurus, 197, 200. 



Icterus Baltimore, nest of, 46. 



Igneous, that have been acted upon 

 by fire, 183. 



Iguanodon, 197. 



Inanimate, destitute of conscious- 

 ness, 19. 



Incessores, perching birds, like birds 

 of prey, xv. 



Incisor teeth, 81. 



Incubation, hatching of eggs by the 

 mother, 107. 



Infusoria, microscopic animals in- 

 habiting the water, not yet fully 

 arranged in their proper classes, 



xix. ; motions of, 16 ; generation 



of, 141. 



Inoceramus, 201. 



Inorganic, not made up of tissues, 11. 

 Insalivation, 83. 

 Instinct, 45. 

 Intelligence, 44. 

 Intercellular passages, 13. 

 Invertebrates, animals destitute of a 



back-bone. 

 Iris, the colored portion of the eye, 



25. 

 Isotelus, 193. 



Jelly-fish. See Medusa. 

 Judgment, 44. 



Labyrinthodon, 196. 



Lacertans, animals of the lizard 



tribe, xvi. 

 Lacteals, vessels which take up the 



nutriment, 76. 

 Lamellibranchiates, mollusks having 



gills arranged in sheets, like the 



clam and oyster, xviii. 

 Larva, the caterpillar or worm state 



of an insect. 

 Larynx, 41. 



Layers of the embryo, 112. 

 Leaping, 67. 

 Leptsena alternata, 192. 

 Life, 11, 20. 

 Limbs, 38. 



Limuea, parasites of, 129 - 31. 

 Lingula prima, 192. 

 Lithodendron pseudostylina, 199. 

 Liver, 101. 



Lobopbyllia flabellum, 199. 

 Lobsters, mode of swimming, 70 ; 



nervous system, 22. 

 Locomotion, 55 ; organs of, 58 ; 



modes of, 64. 

 Lungs, 92. 

 Lymphatic vessels, 76. 



Magas, 200. 



Mammals, animals which nurse 

 their young, xvi. ; number of, 3 ; 

 reign of, 190, 201, 202. 



Man, reign of, 190, 203 ; races of, 

 180 ; liis twofold nature, 1. 



Manducata, insects furnished with 

 jaws, xvii. 



Marchantia polymorpha, reproduc- 

 tion of, 135. 



Marl, earth principally composed of 

 decayed shells and corals, 184. 



Marsupials, animals with a pouch 



