Note 12 — A DESCRIPTION OF THE CRANIUM OF TOXODON PLATENSIS; A gigantic extinct mammiferous animal, referrible to the Order Pachydermata, but with affinities to the Rodentia, Edentata, and Herbivorous Cetacea.

This was written before an examination of the fragment of a lower jaw, forming part of Mr. Darwin’s collection of Fossil Remains, had led me to suspect that it was referrible to the genus Toxodon; should this suspicion prove correct, the four unequal incisors of the upper jaw are opposed to six equal sized ones in the lower.