428 
INDEX. 
Megalosaurus, 324. 
Megatherium, 344. 
Melania, 278. 
Meloloutha, 131,156. 
Mesentery, 83. 
Mesoblast, 199,169. 
Mesoderm, 246. 
Metamorphosis, 207. 
“ of Crab, 209. 
“ of Frog, 209. 
“ of Grasshopper, 20S. 
“ of Insect, 20S. 
“ of Starfish, 208. 
Metazoa, 244. 
Metridium, 251. 
“ see Actinoid Polyp. 
Millepede, see Myriapoda. 
Millepore, 391. 
Mimicry, 217. 
Minerals and Organisms, 19. 
Mite, 2SS, 258. 
Moa, 328. 
Molar Teeth, 69, 70, 9, 31, 35, 36. 
Mole, 346. 
Mollusca, 269. 
“ absorption of, 94. 
“ anatomy of, 45, 46, 47, 78. 
“ circulation in, 106. 
“ development of, 205. 
“ digestion of, 92. 
“ distribution of, 376. 
“ ear of, 17S, 150. 
“ growth of, 214. 
“ kidney of, 126, 78. 
“ liver of, 124. 
“ locomotion of, 161. 
“ metamorphosis of, 211. 
“ mode of feeding of, 52. 
“ mouth of, 56. 
“ nervous system of, 16S, 131, 
135,151-154. 
“ number of species of, 221. 
“ respiration in, 113, 45, 46, 47, 
78. 
“ salivary glands of, 122. 
“ shell of, 133, 385, 99, 100. 
“ skin of, 127. 
“ see Clam, Cuttle-fish, Snail, 
Squid. 
Monad, 243,187. 
Monera, 240, 183. 
Monkey, 356,19, 352. 
“ see Primates. 
Monodelphia, 344. 
Monomya, 271. 
Monotremata, 342, 331. 
“ mouth of, 62. 
Morphology, 12. 
Mosquito, 59, 300, 269. 
metamorphosis of, 208, 173. 
“ mode of feeding of, 50. 
Moth, 300 , 272, 274-276. 
“ anatomy of, 79, 43. 
“ metamorphosis of, 275. 
“ see Butterfly, Lepidoptera. 
Mother-of-pearl, 123. 
Motion, 154. 
Motor Nerves, 167. 
Moulting, 12S, 131, 209. 
Mouse, 346, 65. 
Month, 55. 
“ of Arthropoda, 57. 
“ of Ascidia, 60. 
“ of Birds, 62. 
“ of Coslenterata, 55. 
“ of Echinodermata, 56. 
“ of Fishes, 61. 
“ of Infusoria, 55. 
iX of Mammals, 62. 
“ of Mollusks, 56. 
“ of Parasites, 55. 
“ of Reptilia, 61. 
“ of Vermes, 57. 
“ of Vertebrata, 60. 
Mucous Membrane, S9, 58. 
Mud fish, 315. 
Murex, 278. 
Mus, 346. 
“ see Mouse. 
Mnsca, see Diptera, Fly, House-fly. 
Muscle, 39, 11, 12, 121, 122, 130, 131. 
“ development of, 204. 
“ of Invertebrates, 156. 
“ kinds of, 155. 
“ of Vertebrates, 156. 
Mushroom-coral, 252, 202. 
Musk-deer, 99, 65. 
Mussel, 270, 225. 
! Myriapoda, 287, 259. 
“ alimentary canal of, 77. 
“ mouth of, 57. 
“ respiration in, 110. 
“ see Centipede. 
Myrmecophaga, 344, 333. 
Mytilus, 272, 225. 
Myxine, 67. 
“ see Hag-fisb. 
Nails, 135. 
Narwhal, 6S, 223. 
Natatores, 32S. 
Natica, 27S. 
Natural Selection, 227. 
Nanplius, 211,177. 
Nautilus, SO, 133, 279, 247. 
Necturus, 318, 294. 
Nematelminthes, 265, 218. 
Nereis, 52, 269, 17 
Nerve-cells, 40,132. 
“ fibres, 40,13. 
“ kinds of, 167. 
“ velocity of impulse of, 167. 
