, comparison with one class of animals rather than with one
kingdom.

Phaseoli, crossing in.

Phaseolus vulgaris, sleep-movements of.

Pheasants, display of colour by golden.
-Hewitt on hybrids of.
-hybrids between fowls and.
-protective colouring.

Phillips, J., defines species.
-evolutionary views.
-"Life on the Earth."
-mentioned.

Phillips-Jodrell, T.T., founder of Jodrell Laboratory at Kew.

Philosophical Club.

Philosophical experiments, few naturalists care for.

Philosophising, means and laws of.

Phlox, Darwin's observations on flowers of.
-heterostylism of.
-P. Drummondii.
-P. subulata.

Phyllanthus, F. Muller's paper in "Kosmos" on.
-sleep-movements of.
-P. Niruri, sleep-movements of.

Phryma, de Candolle on.
-occurrence in N. America.

Phyllotaxis, Darwin and Falconer on.

Physical conditions, effect of.

"Physical Geography," Herschel's.

Physicists, disagree as to rate of cooling of earth's crust.

"Physiological Aesthetics," Grant Allen's.

Physiological germs.

Physiological selection, Romanes'.

Physiological species, Huxley's term.

Physiological units, Herbert Spencer's.

Physiological variations.

"Physiology," Huxley's "Elementary Lessons in."
-Darwin on difficulty of.
-Darwin's want of knowledge of.
-Darwin's work on plant-.
-England behind in vegetable.
-small knowledge of ordinary doctors of.
-and vivisection.

Phytophagic varieties, Walsh on.

Phytophthora, potatoes and.

"Pickwick," quotation from.

Pictet, on the succession of forms.
-mentioned.

Pictet and Humbert, on fossil fishes of Lebanon.

Pieris, breeding in confinement.
-colour the result of mimicry.
-protective colouring.
-P. napi.
-Weismann on.

Pigeons, breeding of.
-drawings of.
-experiments on crossing.
-experiments bearing on direct action.
-production of varieties.
-reduction of wings.
-and sterility.
-Tegetmeier's work on.
-Wallace on Malayan.
-Darwin's work on.
-experiments in painting.
-Flourens' experiments on.
-gay deceiver.
-pairing for whole life.
(Barbs.)
(Carriers.)
(Fantails.)
(Laugher.)
(Pouters.)
(Rock.)
(Runts.)
(Tumblers.)

Pigs, crossing of.

"Pikermi," Gaudry's "Animaux fossiles de."

Pinguicula, Darwin's observations on.

Pistyll Rhiadr.

Pisum, cross-fertilisation of.
-P. sativum, visited by Bombus.

Pithecoid man, Huxley's term.

Pithecus, Owen on Ho