444 



INDEX. 



Kat.iirnl pvptom, 374. 



Is'atunilizntion of forms distinct from tlie 

 iii(lif;ei)0U8 species, ll.'J. 



in New Zealand, l'.»7. 

 Naudin, on analof,'ou3 variations in 

 gourds, 15'.t. 



on hyhrid f^ourds, S259. 



on reversion, 'M. 

 Nantilus, Sihirian, 290. 

 Nectar of plants, il.j. 

 Nertaries, how formed, 93. 

 Nelumbinm lutenm, :io4. 

 Nests, variation in, 204, 22o, 2.31. 

 Neuter insects, 22(i. 

 Newman, Colonel, on hnmble-hees, 79. 

 New Zealand, productions of, not per- 

 fect, 197. 



naturalized products of, 315. 



fossil birds of. .317. 



placiers of, .342. 



cnistaceans of, 345. 



alpn of, 315. 



number of plants of, 355. 



nora of, 363. 

 Newton. Sir I., attacked for irrelip;ion, 429. 



Prof, on earth attached to a par- 

 tridge's foot, .3.35. 

 Nicotiana, cros-ed varieties of, 2fi0. 



certain species very sterile, 242. 

 Noble, Mr., on fertility of Rhododendron, 



237. 

 Nodules, phosphatic, iu azoic rocks, 291. 



Oaks, variability of fiO. 



(Enonis, small imperfect flowers of, 129. 



Onites ap|)elles, 1 10. 



Orchestia, dimorphic, .5.5. 



Orchids, fertilization of, 188. 



forms of, 381. 

 Orchis, pollen of, 1S.5. 

 Oriranization, tendency to advance, 121. 

 Orjjans of extreme perfection, 178. 



electric, ofllshes, 18.5. 



of little importance, 190. 



homoloijous. 391. 



nidimcnts of, and nascent, 4W. 

 Ornithorhynchus, 107, 3T(i. 

 Ostrich not capable of lliirht, 140. 



habit of laying eggs together, 212. 



American, two species of, 321. 

 Otter, habits of. how acquired, 173. 

 Ouzel, water, 17fi. 

 Owen, Prof, on birds not flying, 139. 



on vegetative repetition", 151. 



on variability of unusually developed 

 parts, 152. 



on the eyes ofllshes, ISO. 



on the swim-bladder ofllshes, 1S3. 



on the brancbiie ofcirripedes, 183. 



on electric organs. 181. 



on fossil horse of La Plata, 300. 



on relations of ruminants and pachy- 

 derms, 307. 



on fossil birds of New Zealand, 317. 



on succession of types, 31R. 



on alliiiities of the dugong, 374. 



on homologous organs, 391. 



on the mclamorphoaU of ccphalo- 

 pods, 397. 



Pacific Ocean, fannas of, .32'1. 



Pacini, on electric organs, ls,5. 



Paley, on no organ formed to give pain, 



190. 

 Pallas, on the fertility of the domesticated 



descendants of wild stocks, 239. 

 Palm with books, l!^i 

 Paraguay, cattle destroyed by flics, 78. 

 Parasites, 212. 

 Partridge, with ball of earth attached to 



foot, .331, .3.35. 

 Parts greatly developed, variable. 152 

 Parus major. 176. 

 Passiflora, 2:30. 

 Peaches in United States, 89. 

 Pear, grafts of 2-15. 

 Pelargonium, flowers of, 148. 



sterility of, 237. 

 Pelvis of women, 147. 

 Peloria, 148. 

 Period, glacial, .3:57. 

 Petrels, habits of, 177. 

 Phasianus, fertility of hybrids, 239. 

 Pheasant, young, wild, 208. 

 Phillips, Prof, on fresh-water shells, 



.314. 

 Pictct, Prof., on groups of species sud- 

 denly appearing, 286, 287. 



on rate of organic change, 296. 



on continuous succession of genera, 

 298. 



on change in latest tcrtiory forms, 282. 



on close alliance of fossils in consec- 

 utive formations, 312. 



on early transitional links, 287. 

 Pierce, Mr., on varieties of wolves. 93. 

 Pigeons with feathered feet and skin be- 

 tween toes. 26. 



breeds described, and origin of, 3.3. 



breeds of, how produced, 46, 49. 



tumbler, not being able to get out of 

 cgc:. 90, 



reverting to blue color. 161. 



instinct of tumbling, 207. 



young of, 399. 

 Pigs, black, not aflected by the paint- 

 root, 26. 



modified by want of exercise, 193. 

 Pistil, rudimentary, 105, 

 Plants, poisonous", not affecting certain 

 colored animals, 26. 



selection applied to, 42. 



gradual improvement of. 45. 



not improved in barbarous countries, 

 46. 



destroyed hy insects, 75. 



dimorphic, 55, 2,5;J. 



in midst of range, have to strugijla 

 with other plants, 82. 



nectar of, 95. 



fleshy, on sea-shores, 138. 



climbing, 182. 



fresh-water, distribution of, .35.3. 



low in scale, widely-distributed, 307. 

 Plumage, laws of change in sexes of 



birds, 92, 

 Plums in the United Slates, 89. 

 Pointer dog. origin of, 44. 



habits of, 207. 



