78 



INDEX 



Lacunae, of bone, 12. 



Lamella, of gill of mussel, 63. 



Lamprey, birth stage of, 39. 



Lampsilis, 54, 55, 62. 



Larva, 39; of frog, in development, 43. 



Limb buds, of chick embryo, 46; of frog 



tadpole, 46. 



Liver, cells in, 9; of frog tadpole, 44. 

 Loligo, 55. 



Longitudinal muscles, of earthworm, 29. 

 Loxoceras, 70, 71. 

 Lumbricus, 26; L. terrestris, 26. 

 Lung, 57; of frog tadpole, 44. 



Macronucleus, in Paramecium, 33. 



Macrosiphum, parthenogenesis in, 35. 



Magnification, 6. 



Malpighian corpuscle, 18. 



Mammalia, 57. 



Mammary glands, 57. 



Mantle, 55, 63. 



Manubrium, of Obelia, 31. 



Marginal bones, 60. 



Marsupial frog, care of eggs, 39. 



Matrix, of bone, 12; of cartilage, 12. 



Maturation, 40. 



Medusa, of Obelia, 30, 31, 36. 



Merychippus, 73. 



Mesentery, of earthworm, 29. 



Mesohippus, 72, 73. 



Metabolism, 13, 14, 17. 



Metacarpals, 47; of frog, 48; of Hypo- 

 hippus, 72; of man, 47. 



Metagenesis, 35, 36. 



Metamere, of earthworm, 26. 



Metamerism, in earthworm, 26. 



Metaphase, 20, 22. 



Metargiope, 56. 



Metatarsals, 47; of frog, 48; of man, 47. 



Methyl-green, 9, 52. 



Metridium, 52. 



Micronucleus, in Paramecium, 33. 



Microscope, figure of, 5; use of, 5, 6. 



Minks, distribution of, 68. 



Miranda, 56. 



Mitosis, 20, 22; in spermatogonia of grass- 

 hopper, 40. 



Modiola, 54, 55. 



Mollusca, 54. 



Monoecious, 35. 



Moose, distribution of, 68. 



Mouth, of earthworm, 26, 28; of frog 

 tadpole, 43; of mussel, 63. 



Movement, 13; amoeboid, 13; ciliary, 14; 



flagellate, 14; muscular, 16. 

 Muellerian duct, of frog, 37. 

 Muscle, 16. 



Muscular system, of earthworm, 29. 

 Mussel, 14. 

 Myotomes, 16; of frog tadpole, 43, 44. 



Nacre, 70. 



Nais, budding in, 34. 



Nasal pits, of frog tadpole, 43. 



Nautiloid, 71. 



Nautilus, 55, 70, 71. 



Necator, 54. 



Necturus, 58. 



Nemathelminthes, 53, 54. 



Nematocyst, 52; in Hydra, 25. 



Nephridium, of earthworm, 29. 



Nereis, 54. 



Nerve, 16. 



Nerve cord, of earthworm, 29. 



Nervous system, of earthworm, 29. 



Nests, of birds, 39; of mammals, 39. 



Net-knots, 21. 



Neural fold, of frog embryo, 43. 



Neural groove, of frog embryo, 43. 



Neural tube, of frog embryo, 43. 



Neutral red, 15. 



Notes, 2. 



Notochord, 56. 



Nototrema, care of eggs, 39. 



Nuchal plate, 60. 



Nucleolus, 10. 



Nucleus, 8, 9, 21, 51; chromatin of, 10; 

 membrane of, 21; nucleolus of, 10; of 

 Amoeba, 11; of Ascaris, 41; of Epis- 

 tylis, 23; resting, 21. 



Obelia, 30, 52; metagenesis in, 36. 

 Oocyte, of Ascaris, 40, 41; primary, 41; 



secondary, 41. 

 Oogonium, of Ascaris, 41. 

 Operculum, 56; of frog tadpole, 43, 44. 

 Opisthoccelous, 60. 

 Orders, 57, 58, 59, 61. 

 Ordovician, 71. 

 Organs, 16. 

 Orohippus, 72. 

 Orthoceras, 70, 71. 

 Orthocone, 70, 71. 

 Osmosis, 17. 

 Ovary, of earthworm, 27, 30, 34 ; of frog, 37 ; 



of Hydra, 26; of viviparous animal, 38. 



