ORIGIN OF SPECIES:

OR,

THE CAUSES OF THE PHENOMENA

OF

ORGANIC NATURE.

A Course of Six Lectures to Working Men.

BY

THOMAS H. HUXLEY, F.R.S., F.L.S.,

PROFESSOR OF NATURAL HISTORY IN THE JERMYN STREET SCHOOL OF MINES.

NEW YORK:

D. APPLETON AND COMPANY,

1, 3, AND 5 BOND STREET.

1881.