Pœcilozonites, peculiar to Bermuda, [270]

Poinciana regia in Madagascar, [440]

Populus, fossil in Spitzbergen, [184]

Pourtales, Count, on modern formation of chalk, [95]

on sedimentary deposits in Gulf of Mexico, [222]

Poverty in species of Britain, [338]

Precession of Equinoxes, influence of, on climate, [126]

Preservation of species, [63]

Proboscidea, range of, [30]

Proteus, why preserved, [63]