7 books
The Osteology of the Reptiles - Scholar's Choice Edition
The Osteology of the Reptiles - Primary Source Edition
Evolution of Mammalian Molar Teeth to and from the Triangular Type Including Collected and Revised Researches Trituberculy and New Sections on the for
The Osteology of the Reptiles
The Orders of Mammals
Fish Skulls; A Study of the Evolution of Natural Mechanisms
Evolution of Mammalian Molar Teeth to and from the Triangular Type Including Collected and Revised Researches Trituberculy and New Sections on the Forms and Homologies of the Molar Teeth in the Different Orders of Mammals