n Phyllanthus.

Parallel Roads of Glen Roy (see Glen Roy).

Parana, Darwin finds Mastodon at.

Pararge, breeding in confinement.

Parasites, and degeneration.
-extermination of game by.
-bloom as protection against.
-and galls.

Parietaria, explosive stamens of.

Parrots, as agents in seed-dispersal.

Parsimony, Hamilton's law of.

Parthenogenesis, Darwin on.
-Owen's Hunterian lecture on.
-in Primula.
-J. Scott's work on.

Partridges, as agents of seed-dispersal.
-rudimentary spurs on legs of.

Parus caeruleus, protective colouring of.

Passiflora, bloom experiments on.
-Lord Farrer's work on.
-position of flowers of.
-Muller assists Lord Farrer in work on.
-Scott's work on.
-self-sterility of.
-Sprengel on.
-visited by humming-birds.
-P. gracilis, dispersal of seeds.
-P. princeps, adapted to humming birds.

Patagonia, L. Agassiz on elevation of.
-Darwin on geology of.
-gigantic land-sloth of.
-Admiral Sulivan on.

Pathology, Paget's lectures on.

Pattison, Mark.

Pavo nigripennis.

Payne, on effect of rain on plants.
-observations by.

Peaches, bud-variation in.
-raised from seed.

Peacock, evolution and Sexual Selection of.
-experiments on cutting tail of male.
-muscles of tail of.

Pearson, H.H.W., on the botany of Ceylon patanas.

Peas, course of vessels in ovary of sweet-.
-crossing in.
-fertilisation of.
-waxy secretion in.

Pecten, P. latissimus.

Pelargonium, peloric.
-Beaton on.
-Darwin's experiments on.
-flowers of.
-P. multiflora alba, Darwin's experiments on crossing.

Pelobius, Darwin on.

Peloria, effect of pollen on regular flowers.
-Darwin suggests experiments on.
-Masters on.
-in Pelargonium.
-inheritance of.

Peneus, F. Muller on.

Pentateuch, N. Lewy on.

Periodicals, Darwin's opinion of scientific.
-foreign compared with English.

Peripatus, Moseley's work on.

Peristylus viridis, Lord Farrer's observations on.

Permanence of ocean basins.

Permian period, glacial action during.
-freshwater beds in India.

"Personal Narrative," Humboldt's.

Peru, anarchy in.
-Darwin on terraces in.
-D. Forbes on geology of.

Peuquenes Pass, Darwin visits.

Pfeffer, Prof., on chemotaxis.
-considers Wiesner wrong in some of his interpretations.
-on Drosera.
-"Periodische Bewegungen."

Pfitzer, on classification of orchids.

Pfluger.

Phalaenopsis.

Phanerogams