An introduction to the classification of animals / by Thomas Henry Huxley, LL.D., F.S.R., Professor of Natural History in the Royal School of Mines, and Professor of Comparative Anatomy and Physiology to the Royal College of Surgeons of England.

Presentation inscription written in pen on half t.p.
"The present work contains the substance of the six Lectures on the Classification of Animals, which form the first part of my 'Lectures on the Elements of Comparative Anatomy,' published in 1864"--Preface.
Publisher's device on t.p.
"London: printed by W. Clowes and Sons, Stamford Street and Charing Cross"--Half t.p. verso.
Erratum: p. 147.
Publisher's advertisement dated May 1869 ([40] p.) following main sequence.