Nectaries, how formed, 92.
Nelumbium luteum, 387.
Nests, variation in, 212.
Neuter insects, 236.
Newman, Mr., on humble-bees, 74.
New Zealand:
productions of, not perfect, 201.
naturalised products of, 337.
fossil birds of, 339.
glacial action in, 373.
crustaceans of, 376.
alg of, 376.
number of plants of, 389.
flora of, 399.
Nicotiana:
crossed varieties of, 271.
certain species very sterile, 257.
Noble, Mr., on fertility of Rhododendron, 251.
Nodules, phosphatic, in azoic rocks, 307.
Oak, varieties of, 50.
Onites apelles, 135.
Orchis, pollen of, 193.
Organs:
of extreme perfection, 186.
electric, of fishes, 192.
of little importance, 194.
homologous, 434.
391