Index. 



457 



relation totheformationofgalls, 



293-295, 446-448. 

 Nature, organic, 17; inorganic, I, 



17, 18. 



Nauplitu, 138. 

 Neumayr, 19. 

 New Zealand, fauna of, 68, 204, 



205 ; thriving of exotic specits 



in, 286. 



Newman, on the Illative S' use. 6. 

 Newton, his idea of scier.t.fic 



method, 6. 



Nictitating membrane, 74, 75. 

 Notochord, 146. 

 Novum Organon, the, on scientific 



method, 2. 



Nucleus, 105, 112-134. 

 Nucleus-spindle, 129. 

 Nut-hatch. Syrian, ornamented 



nests of, 381. 



O. 



Objective methods, 6. 

 Oceanic islands, see Islands. 

 Octopus, eye of, 57, 58, 348-350. 

 CEdicnenius crepitans, 320. 

 Ontogeny, as recapitulation of 



phylogeny, 98-104. 

 Oiang Outang, see Apes. 

 Oreilon Culbertsoni, 167. 

 Origin of Speci< s, the, influence 



exercised by, on ideas of method, 



19. 



Orohippus, 189. 

 Otana eye of, 75. 

 Ovum, 113-142; human, 120-123; 



amoeboid movements of young, 



121-123; segmentation of, 134, 



J 35- 

 Owen, on ear of whale, 65; on 



natural selection, 333, 334. 

 Owl, eye of, 75. 



P. 



Paddle, see Whale, and Baptanodon 



discus. 



Pagunts bernhardus, 64. 

 Pain, in relation to the theory of 



evolution, 417. 

 Palaeontology, 159-203; gtneral 



testimony of, 156-165; te-timony 



of, IP particular cases, 165-203 ; 



consideration of objections to 

 theory of evolution founded on 

 grounds of, 156-165, and Ap- 

 pendix. 



Palteotherium, 190,191. 



Pnley, on natural theology, 98, 412. 



Paludina, successive forms of, 19. 



Panama, Isthmus of, 219. 



Panniculus carnosjs, 77. 



Papilio merope, 730. 



Parasites, of animals, devoid of 

 beauty, 408. 



Parsimony, law of, 272. 



Parthenogenesis, 119. 



Parti idges, 319. 



Peacock, tail of, 378 ; courtship of, 



383- 



Peck ham, Mr. and Mrs., on court- 

 ship of spiders, 388-390. 

 Perissodactyls, 182-192. 

 Petromyzon marinus, 148. 

 Phenac odus primtEVits, 184, 185. 

 Phylogeny, see Ontogeny. 

 Physiological selection, 376. 

 Pig, embryology of, 153 ; feet of, 



176, 187 ; portraits of wild and 



domesticated, 312. 

 Pigeons, portraits of, 298, 299; 



leather-footed, 359. 

 Pilot fish, 289. 

 Planorbis, transmutations of, 200, 



201. 

 Pleasure and pain, in relation to 



the theory of evolution, 417. 

 Plica semiliinaris, 75. 

 Pliohippus, .89 

 Polar Lear, skeleton of, 174; ttet 



of, 178. 



Polar bodies, 125, 126. 

 Polar star, 129. 

 Polyps, 114. 

 Poi poises, 24, 25, 50. 

 Poulton, E. B., on warning colours, 



325, 326; on mimicry, 331, 332 ; 



sexual selection, 400, 401, 449, 



450- 



Poultry, portraits of, 300-302. 

 Pronucleus, 126-128. 

 Prophetic types, 272, 351-362. 

 Prophysema primordiale, 1 40. 

 Protective colouring, 317-323. 

 Protohipfus, 189. 



