318 



INDEX 



scallop's and the vertebrate's 

 eye, 257-258. 

 quoted, 230, 290. 



Bernard, Claude, his work on the 

 phenomena of life, 178-179, 

 1 80. 



Biology, of spring, 151. 

 of twins, 158-165. 



Bipedal progression, 287-288. 



Blackburn, Mrs., accuracy of her 

 drawing of young cuckoo clear- 

 ing nest by force, 46. 



Blegvad, Dr., on detritus-eating 

 creatures, 86. 



Bonhote, J. Lewis, his breeding ex- 

 periments, 265-266. 

 on vigor and heredity, 264, 266- 

 269. 



Boulenger, Dr., quoted, on frogs, 

 47- 



Brachet, Professor, his lectures on 

 the egg, 134, 136, 138. 



Brandt, Professor, on Plankton in 

 polar and tropical seas, 85-86. 



Branford, Benchara, quoted, 299. 



Brer Rabbit's policy, 128. 



Bull en, G. E., his demonstration as 

 to the correspondence between 

 the catches of mackerel and the 

 amount of Copepod plankton, 

 80. 



Burroughs, John, quoted, 218-219, 

 262. 



Burton, Robert, quoted, 313. 



Butler, Samuel, quoted, 25, 223. 



Caesar, the motive of his expedition 

 into Britain, 67. 



Cairngorms, their slopes in winter, 

 127, 129, 132. 



Caterpillars, Procession, their in- 

 stinct limited, 210. 



Cave blindness, the problem of, 

 246-253. 



Cerambyx beetle, grub of, 208-209. 



Chamberlin, Professor, on the ori- 



gin of life on the earth, 214, 

 217, 218. 

 Chambers, Robert, on the embryo, 



148. 



Change, the fountain of, 238-245. 

 the problem of what brings it 



about, 238-239. 

 Characteristic sounds of particular 



places, 108-109. 

 Cheerfulness. See Joy. 

 Child, Professor W. M., on senes- 

 cence and rejuvenescence, 151, 

 I53-IS7. 



Chimpanzee, restless habits of, 195. 

 Chlamydosaurus, 287. 

 Chromosomes, number of, 136, 137, 



138, 242-243, 244. 

 Claparede, 285. 

 Cod, journeyings of, 196. 

 Convergence in evolution, 254-262. 

 of Australasian animals, 256-257. 

 three suggestions with regard to, 



259-261. 



Copepod plankton, 80, 81, 84, 87. 

 Correns, 232. 

 Country sounds, 104-110. 

 Cowrie shells and symbolism, 64, 



68-70. 



Crab, common, journeyings of, 196. 

 Crime. See Sequel to " The 



Jukes." 



Crustaceans, autotomy in, 170-172. 

 freshwater, their survival of 



drought, 176. 

 Cuckoo puzzles, 39-46. 

 Cuckoos, resentful attitude of 

 hedge-sparrow and little birds 

 to, 40-41. 

 resemblance of eggs to selected 



foster-parent, 44. 

 securing success for their off- 

 spring, 272. 



smallness of their eggs, 44. 

 their abundance in 1916, 39. 

 their calls, 39-40. 

 their evasion of brooding, 41-43. 



