In Ten Volumes. Fully Illustrated. Medium 8vo. 21s. net each

The Cambridge Natural History

Edited by Sir S. F. Harmer, K.B.E., Sc.D., F.R.S., and A. E. Shipley, G.B.E., M.A., F.R.S.

FIELD.—"The Cambridge Natural History series of volumes is one of very great value to all students of biological science. The books are not intended for popular reading, but for utilisation by those who are desirous of making themselves thoroughly acquainted with the branches of zoology of which they treat."