444 



INDEX 



Menura 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. 



metarn orphic 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. 

 microlecithal, 267. 

 Microlestes, 301, 302. 

 micronucleus, 39, 92. 

 rnicropyle, 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. 

 Miiller, Fritz, 346. 

 Miillerian mimicry, 346. 

 multicellular, 38. 



organisms, origin of, 



44. 



Multituberculata, 302. 

 multiplication of cells, 69 80. 

 MungoswelPs 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, 



389 391. 

 Buffon on. 368. 



