322 



INDEX 



Meredith, George, quoted, 10, no, 



203. 



"Metabolism," 264-265, 268. 

 Metchnikoff, on cause of growing 



old, 152. 



on inflammation, 304. 

 Microcosm of the egg, 134-141. 

 Midwinter, 127-133. 

 Milton, quoted, 76, 130. 

 Mitchell, Dr. Chalmers, 149. 

 Modifications, 305. 

 Moore, Professor Benjamin, on 



contents of sea-water, 83. 

 Morgan, T. H., his experiments on 



the fruit-fly, 236. 

 Murray, Sir John, quoted, 81-82, 



86. 

 MMJ ramgarettae, 290. 



Nansen, in Far North, 127. 



on restless men, 195. 

 Natural selection of variations a 



vera causa in evolution, 225, 



227-228. 



Neger, on ants' food, 187. 

 Nematodes, in food-canal of grouse, 



201. 

 Newman, Horatio Hackett, on 



biology of twins, 158-162. 

 Newton, Professor, his theory as to 



cuckoos' eggt, 44, 45. 

 Noddy terns, homing experiments 



on, 1-6. 



Noisiest thing in the world, 103. 

 Nomadism, 191-197. 



two kinds of, 195. 

 Norman, Canon, on shells, 282. 



Odoriferous gland in shrews, 99. 

 Odoriferous substances, in butter- 

 flies and moths, 97. 

 in hound's tongue and mice, 100- 



101. 



in insects, 98, 99. 

 in plants, 95-97. 



Odors of mammals and reptiles, 



98. 

 CEcotrophobiosis, nutritive exchange, 



29, 31. 

 (Enothera lamarckiana, 240, 241, 



243- 



Ogneff, his experiments on gold- 

 fishes, 249. 



Onneas, M. Kammerlingh, his re- 

 frigerating laboratory, 180. 

 Onychophera, 145. 

 Otter, its catholicity of appetite, 121. 

 its intensity of parental care, 122. 

 its playfulness, 123. 

 its resourcefulness, 124. 

 its roving spirit, 124. 

 its scent, 121. 

 its test-time during prolonged 



frost, 125. 



the survival of the, 120-126. 

 Owen, Sir Richard, 291. 



Parasites, differences of, 199-200. 

 effects on hosts, 201. 



great mortality from, 202. 

 repulsiveness of, 202-203. 

 " wildness " and devilry of, 204. 



Parasitism, the problem of, 198-205. 



Parker, Professor G. H., quoted, on 

 sense organs, 100. 



Parthenogenesis, artificial, 139-140. 



Pathology, the optimism of, 302- 

 308. 



Paul, J. Herbert, his work on 

 Crustaceans, 170, 172. 



Pavlov, Professor Ivan Petrovich, 

 his experiment on mouth- 

 watering of dog, 56-57. 

 his investigations on emotions 

 and bodily health, 309, 310. 



Pearls, 66-68. 



Pearson, Professor Karl, his study 

 of inheritance, 231. 



Penguins, Ad6He, observations oa 

 the habits of, 9-16. 



Peridinians, 81, 87. 



