1. and 1936 The Comparative Anatomy of the Nervous System of Vertebrates, Including Man. Macmillan Co., New York. Two volumes. (Reprinted 1960 by Hafner, New York. Three volumes, 1-695, 696-1239, 1240-1845 pp.)
2. 1964 Patterns of Mammalian Reproduction. Cornell University Press, Ithaca. Second edition.
3. 1968 The Brain Stem of the Cat: A Cytoarchitectonic Atlas with Stereotaxic Coordinates. University of Wisconsin Press, Madison.
4. A study of diencephalic development in the albino rat
5. 1958 Embryos and Ancestors. Oxford University Press, London. Third edition.