This book looks at how an animal is organized to carry out a difficult task - that of feeding on plants. The complex adaptations necessary to enable animals to obtain nutrients successfully from a herbivorous diet are many. For the first time these problems are examined here purely from the perspective of reptiles. Common themes are teased out and arranged chronologically to help gain an understanding of the patterns of diversity change in the group. This book will be of great interest to researchers and students of zoology, palaeontology, evolution, ecology, functional anatomy and morphology.