, on striped hemionus
Potemogeton
Pouchet, on the colours of flat-fish
Prestwich, Mr., on English and French eocene formations
Proctotrupes
Proteolepas
Proteus
Psychology, future progress of
Pyrgoma, found in the chalk
Quagga, striped
Quatrefages, M., on hybrid moths
Quercus, variability of
Quince, grafts of
Rabbits, disposition of young
Races, domestic, characters of
Race-horses, Arab
--English
Radcliffe, Dr., the electrical organs of the torpedo
Ramond, on plants of Pyrenees
Ramsay, Prof., on subaerial denudation
--on thickness of the British formations
--on faults
Ramsay, Mr., on instincts of cuckoo
Ratio of increase
Rats, supplanting each other
--acclimatisation of
--blind, in cave
Rattle-snake
Reason and instinct
Recapitulation, general
Reciprocity of crosses
Record, geological, imperfect
Rengger, on flies destroying cattle
Reproduction, rate of
Resemblance, protective, of insects
--to parents in mongrels and hybrids
Reversion, law of inheritance
--in pigeons, to blue colour
Rhododendron, sterility of
Richard, Prof., on Aspicarpa
Richardson, Sir J., on structure of squirrels
--on fishes of the southern hemisphere
Robinia, grafts of
Rodents, blind
Rogers, Prof., Map of N. America
Rudimentary organs
Rudiments important for classification
Rutimeyer, on Indian cattle
Sageret, on grafts
Salamandra atra
Saliva used in nests
Salmons, males fighting, and hooked jaws of
Salt-water, how far injurious to seeds
--not destructive to land-shells
Salter, Mr.
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