Treatise Online, no. 13, Part M, Chapter 5: Reproduction and lifespan Treatise Online, no. 13, Part M, Chapter 5: Reproduction and lifespan
Treatise Online, no. 14, Part M, Chapter 6: Biogeography of Recent forms Treatise Online, no. 14, Part M, Chapter 6: Biogeography of Recent forms
Treatise Online, no. 17, Part M, Chapter 3: Anatomy of Recent forms Treatise Online, no. 17, Part M, Chapter 3: Anatomy of Recent forms
Treatise Online, no. 23: Part M, Chapter 7: Ecology and mode of life. Treatise Online, no. 23: Part M, Chapter 7: Ecology and mode of life.
Treatise Online no. 69: Part M, Chapter 12: The Buccal Apparatus of Recent and Fossil Forms Treatise Online no. 69: Part M, Chapter 12: The Buccal Apparatus of Recent and Fossil Forms