1. (1843). Lectures on Comparative Anatomy and Physiology of the invertebrate Animals, delivered at The Royal College of Surgeons in 1843. Longman, Brown, Green and Longman, London.
2. (1994). Homology, topology, and typology: The history of modern debates. In Homology: The Hierarchical Basis of Comparative Biology (ed. ), pp. 64-101. Academic Press, Inc., New York.
3. (1982). Evolutionary Developmental Biology. Chapman and Hall, London, New York.
4. (1982). The Growth of Biological Thought. The Belknap Press of Harvard University Press, Cambridge, MA.
5. (1994). Homology and the mechanisms of development. In Homology: The Hierarchical Basis of Comparative Biology (ed. ), pp. 274-301. Academic Press, Inc., New York.