INDEX 



849 



N 



Nageli, on morphological characters, 

 i. 292 



Nails, rudimentary, ii. 270 



Nathusms, Von, on pigs, i. 275 



Natural history, future progress of, il 

 311 



selection, i. 120 



system, ii. 213 



Naturalization of forme distinct from 

 the indigenous species, i. 162-163 



Naturalization in New Zealand, i. 

 281 



Naudin, on analogous variations ia 

 gourds, i. 221 



, on hybrid gourds, Ii. 44 



■ , on reversion, ii. 47 



Nautilus, Silurian, ii. 89 



Nectar of plants, i. 137 



Nectaries, how formed, i. 138 



Nelumbium luteum, ii. 185 



Nests, variations in, i. 351, 383, 392 



Neuter insects, i. 387-388 



Newman, Ck)l., on humble-bees, i. 113 



New Zealand, productions of, not per- 

 fect, i. 281 



, naturalized products of, ii. 127 



, fossil birds of, ii. 129 



, glaciers of, ii. 167 



, crustaceans of, ii. 172 



, algse of, ii. 172 



, number of plants of, ii. 187 



, flora of, ii. 198 



Newton, Sir I., attacked for irreliglon, 

 ii. 304 



, Prof., on earth attached to a 



partridge's foot, ii. 156 



Nicotiana, crossed varieties of, ii. 45 



, certain species very sterile, ii. 20 



Nitsche, Dr., on the Polyzoa, i. 328 



Noble, Mr., on fertility of Rhododen- 

 dron, ii. 14 



Nodules, phoaphatic, in azoic rocks, 

 ii. 90 



Oaks, variability of, i. 85 



Onites, appelles, i. 194 



Ononis, small imperfect flowers of, i. 



295 

 Orchids, fertilization of, i. 267 

 , the development of their flowers, 



i. 330 



, forms of, ii. 225 



Orchis, pollen of, i. 262 

 Organization, tendency to advance, L 



176 

 Organs of extreme perfection, L 260 



, electric, of fishes, i. 260 



of little importance, i. 271 



, homologous, ii. 242 



, rudiments of, and nascent, iL 



264-265 

 Ornithorhynchus, i. 154; ii, 217 



, mammae of, i. 323 



Ostrich not capable of flight, i. 307 

 , habit of laying eggs together, i. 



363 

 , American, two species of> ii. 



140 

 Otter, habits of, how acquired, i. 242 

 Ouzel, water, i. 248 

 Owen, Prof., on birds not flying, i. 193 



, on vegetative repetition, i. 210 



, on variability of unusually de- 

 veloped parts, i. 211 



, on the eyes of fishes, i. 253 



, on the swimbladder of fishes, L 



257 

 , on fossil horse of La Plata, iL 



103 



, on generalized form. 5i. 1 14 



, ou relation of ruminants and 



pachyderms, ii. 116 

 , on fossil birds of New Zealand, 



ii. 128 

 — — , on succession of types, Ii. ISS 

 ■ , on affinities ot the dogci^, ii. 



216 



