On the natural history of the dugong, (Halicore indicus, Desm.) - the mermaid of early writers; and particularly on the differences which occur in its dental characters.

Edinburgh Jour. Nat. & Geogr. Sci. 1: 161-172. "Dec. 1829" (read to Roy. Phys. Soc. Edinb., Nov. 3, 1829).