This book is a reprint of the Hunterian lectures delivered at the Royal College of Surgeons in 1906. The first lecture considers the temporal bone at birth, and takes up in detail the various divisions of the bone, including the surgical anatomy of the labyrinth. The second lecture discusses the superficial changes in the bone during growth; the relation of the lateral sinus to the surface; the consistence of the outer antral wall and mastoid; variations in the antrum, and variations in the middle ear proper. Lecture Three deals with the surgery of the mastoid region, including the anatomic relations of the parts. The illustrations are excellent.