Prestwich, Mr., on English and French eocene formations, 328.
Primrose, 49.
sterility of, 247.
Primula, varieties of, 49.
Proteolepas, 148.
Proteus, 139.
Psychology, future progress of, 488.
Quagga, striped, 165.
Quince, grafts of, 261.
Rabbit, disposition of young, 215.
Races, domestic, characters of, 16.
Race-horses:
Arab, 35.
English, 356.
Ramond on plants of Pyrenees, 368.
Ramsay, Professor:
on thickness of the British formations, 284.
on faults, 285.
Ratio of increase, 63.
Rats:
supplanting each other, 76.
acclimatisation of, 141.
blind in cave, 137.
Rattle-snake, 201.
395