INDEX 



328 



Petersen, Professor C. G. Job., on 

 sea-bottom meadows of Danish 

 waters, 89-94. 



Petersen and Jensen, Danish 

 naturalists, on organic matter 

 of sea-floor, 83. 



Phalangidae, 169-170. 



Physa gyrina, common water- 

 snail, 56. 



Phyto-plankton, 81, 82, 86. 



Planarian worms, 153-1 54- 



Plankton organisms, 83, 84, 86, 89, 

 90. 



Polyergus rufescens, slave-owning 

 ant, 18. 



Pond-life in winter and spring, 

 132. 



Primates, 288, 290-292. 



Problem of cave blindness, the, 

 246-253- 



Problem of the origin of the dis- 

 tinctively new, 238. 



Progressiveness of evolution, 227. 



Proliferation of evil, four sugges- 

 tions to prevent the, 299*301. 



Proteus, 247, 249, 274. 



Psammosphaera, 283. 



Ptyalism, 306, 307. 



Purple dye from sea-snails, 65-66. 



Putter, Professor, his heresy as to 

 sea-water, 83. 



Rana esculent a, 48. 



temporaria, 47. 

 Raspail, on young cuckoo's conduct 



in nest, 45. 



Rejuvenescence, 150-157. 

 Reophax, 281. 



Riddle, Professor Oscar, 138. 

 Rignano, editor of Scientia, 223. 

 Robinson, Phil, his observation as 



to parent birds' " peptoniza- 



tion " of food for young, 36. 

 Rooks, cawing of, 32-38. 



their courtship, nesting, eggs, and 



habits, 34-38. 



Roubaud, Dr., his discoveries as to 

 domestic economy of African 

 wasps, 26-31. 



Roving impulse, the, 191-197. 



Saleeby, Dr., quoted, 310. 

 Salmon, in autumn, 113-114. 

 Sea, internal economy of the, 80-87. 

 Sea-cucumbers, 1 69. 

 Sea-grass, 89-94. 

 Sea-meadows, 82, 88-94. 

 Sea-swallows, homing of, 1-8. 

 Seeds, dried, 177. 



experiments on, 177, 180-181. 



germinative power of, 179. 



their capacity for lying low, 181- 



182. 

 Selous, Edmond, quoted, on rooks* 



cawing, 33. 



Senescence, 151-152, 154-157. 

 Senility, 151-152. 



Sense of smell, differentiated from 

 that of taste, 99. 



in insects, 98. 



in man, 95-102. 



in the dog, 99. 

 Sense of taste, 99, 100. 

 Sequel to "The Jukes," 294-301. 

 Shakespeare, quoted, 87, 197. 

 Shelley, quoted, 304. 

 Shells, the appeal of, 62. 



the cult of, 62-70. 



the delight in, 62. 



their decorative value, 64. 



their interest to students of hu- 

 man history, 63. 



their practical value for food, 64. 



their psychological value as sym- 

 bols and charms, 64, 66-70. 

 Shell-trumpet, 64-65. 

 Sherrington, Professor, quoted, 99. 



3i3- 



Shipley, Dr., 198. 

 Siamese twins, 141, 159, 160. 

 Smith, Professor Elliot, on the cult 

 of shells, 63, 68, 69. 



