INDEX 
Petersen, Professor C. G. Joh., on 
sea-bottom meadows of Danish 
waters, 89-94. 
Petersen and Jensen, Danish 
naturalists, on organic matter 
of sea-floor, 83. 
Phalangide, 169-170. 
Physa = gyrina, common 
snail, 56. 
Phyto-plankton, 81, 82, 86. 
Planarian worms, 153-154. 
Plankton organisms, 83, 84, 86, 89, 
water- 
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. 
Psammosphera, 283. 
Ptyalism, 306, 307. 
Purple dye from sea-snails, 65-66. 
Pitter, Professor, his heresy as to 
sea-water, 83. 
Rana esculenta, 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. 
328 
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, 169. 
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, 18r« 
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, roo. 
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. 
313. 
Shipley, Dr., 198. 
Siamese twins, 141, 159, 160. 
Smith, Professor Elliot, on the cult 
of shells, 63, 68, 69. 
