First published in 1936, Colyer's Variations and Diseases of the Teeth of Animals drew extensively on the material housed in the Odontological Museum of the Royal College of Surgeons of England, and quickly became an indispensable reference for students and research workers in zoology, archaeology and veterinary science, as well as human dentistry. In this second edition, Colyer's successors at the Odontological Museum have fully revised the text in the light of new knowledge, while preserving the best of Colyer's own material. The text has been rearranged taxonomically and a new introduction reviewing conceptual advances in the field since Colyer's time has been added. The numerous illustrations, classics of their kind, have been reproduced to a high standard from Colyer's originals and many new figures have been incorporated. This revision will introduce Colyer's material to a new audience, for whom it represents a comprehensive and fully-referenced survey of abnormalities and diseases of the teeth and jaws of animals.