444 



INDEX 



Men ura superba, 349, Fig. 178. 



meristem, 76. 



meristic mutations, 154. 



variations, 148, 149. 

 merogony, 146, 174. 

 Merychippus, 310, Fig. 153. 

 mesentery, 54. 

 mesoblast, 48, 266. 

 mesoblastic somites, 266. 

 mesoderm, 48, 124. 

 mesogloea, 115, 116. 

 Mesohippus, 310, Figs. 153, 156. 

 mesophyll, 50, 64, Fig. 26. 

 Mesozoic Era, 284, 285. 

 metabolism, 9, Fig. 1. 

 metacarpals, 238. 

 metagenesis, 121. 

 metameric segmentation, 149, 266, 



279. 



metamorphic rocks, 283. 

 metamorphosis, 263. 

 Metaphyta, 44, 95. 

 metapodials, 240, 241. 

 metatarsals, 238. 

 Metatheria, 301, 302. 

 Metazoa, 44. 

 mice, dispersal, 325. 



,, experiments in heredity, 179, 



182. 



microgametes, 85, 88, 91. 

 inicrolecithal, 267. 

 Microlestes, 301, 302. 

 micronucleus, 39, 92. 

 micro pyle, 109. 

 microsporangia, 107. 

 microspores, 105, 106, 107. 

 microzooids, 33. 

 migration from north, 329. 

 milk, 271. 

 mimicry, 343348. 



,, and fluctuating variation, 



415. 

 ,, and natural selection, 396, 



405. 



rings, 345. 

 mineral salts, 23. 

 Miocene Epoch, 284. 

 Miohippus, 310. 

 mitosis, 6979, Figs. 3135. 



,, in heredity, 169. 

 mnemic theory of heredity, 186, 191, 



192. 



moas, 258, 397. 

 models and mimics, 345, 348. 

 Mceritherium, 313, Fig. 159. 

 moles, marsupial, 253. 

 Molluscoida, 277. 



momentum in evolution, 406 409. 

 monads, 83. 

 Monera, 66. 

 monoecious, 103, 105. 

 monohybridism, 201, Fig. 79. 

 monopodial branching of phyloge- 



netic tree, 230, 231, Fig. 87. 

 monosome, 135. 



Monotremata, 234,296, 301, 302, 331. 

 monstrosities, 154, 157. 

 Morioris, extermination, 398 400. 

 mosses, dispersal, 321. 

 moths, clear- winged, 343, Fig. 175. 

 ,, proboscis, 354. 

 ,, protective resemblance, 338. 

 motion, in living organisms, 6. 

 mountain hare, distribution, 333. 

 mud, dispersal in, 327. 

 mud-fishes, 255, 291. 

 Muller, Fritz, 346. 

 Miillerian mimicry, 346. 

 multicellular, 38. 



,, organisms, origin of, 



44. 



Multituberculata, 302. 

 multiplication of cells, 6980. 

 Mungoswell's wheat, 412. 

 Muscari, variation in, 150. 

 muscle fibres, 57, 58, 116, Figs. 21, 



22, 58. 



music and memory, 192. 

 mutation and adaptation, 414, 415. 

 evolution, 414. 

 hybridization, 413 



414. 



,, Mendelism, 415. 

 ,, natural selection, 414. 

 theory, 224. 

 mutations, 149, 153156, 224. 

 ,, meristic, 154. 



origin, 159, 160. 

 ,, of species from, 



411, 412, 413. 

 ,, substantive, 154. 

 mutilations, inheritance of, 178, 179. 

 mutual adaptation, 414, 415. 

 Mycetozoa (Myxoinycetes), 67, Fig. 

 29. 



N. 



NAGELI, 167. 



natural affinities, 228, 229. 



selection, 395409. 

 ,, ,, and mutation, 414. 



A. E. Wallace on, 



389391. 

 Buffon on, 368. 



