, on the formations of Russia
--on azoic formations
--on extinction
Murie, Dr., on the modification of the skull in old age
Murray, Mr. A., on cave-insects
Mustela vison
Myanthus
Myrmecocystus
Myrmica, eyes of
Nageli, on morphological characters
Nails, rudimentary
Nathusius, Von, on pigs
Natural history, future progress of
--selection
--system
Naturalisation of forms distinct from the indigenous species
--in New Zealand
Naudin, on analagous variations in gourds
--on hybrid gourds
--on reversion
Nautilus, Silurian
Nectar of plants
Nectaries, how formed
Nelumbium luteum
Nests, variation in
Neuter insects
New Zealand, productions of, not perfect
--naturalised products of
--fossil birds of
--glaciers of
--crustaceans of
--algae of
--number of plants of
--flora of
Newman, Col., on humble-bees
Newton, Prof., on earth attached to a partridge's foot
Newton, Sir I., attacked for irreligion
Nicotiana, crossed varieties of
--certain species very sterile
Nitsche, Dr., on the Polyzoa
Noble, Mr., on fertility of Rhododendron
Nodules, phosphatic, in azoic rocks
Oak, varieties of
Onites apelles
Orchids, fertilisation of
--the development of their flowers
--forms of
Orchis, pollen of
Organisation, tendency to advance
Organs of extreme perfection
--electric, of fishes
--of little importance
--homologous
--rudiments of, and nascent
Ornithorhynchus, mammae of
Ostrich not capable of flight
--habit of laying eggs together
--American, two species of
Otter, habits of, how acquired
Ouzel, water
Owen, Prof.
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