Cohen and Peter.
Collingwood.
Colobopsis truncata.
Colour, E.B. Poulton on The Value in the Struggle for life of.—influence and temperature on changes in.—in relation to Sexual Selection.
Colours, incidental.—warning.
Comte, A.
Condorcet.
Cope.
Coral reefs, Darwin's work on.
Correlation of organisms, Darwin's idea of the.