1st, I have the tarsi and metatarsi very perfect of a Cavia; 2nd, the upper jaw and head of some very large animal with four square hollow molars and the head greatly protruded in front.

I at first thought it belonged either to the Megalonyx or Megatherium (4/1).

The animal may probably have been Grypotherium Darwini, Ow.

The osseous plates mentioned below must have belonged to one of the Glyptodontidae, and not to Megatherium.
We are indebted to Mr.Kerr for calling our attention to a passage in Buckland's "Bridgewater Treatise" (Volume II., page 20, note), where bony armour is ascribed to Megatherium.); in confirmation of this in the same formation I found a large surface of the osseous polygonal plates, which "late observations" (what are they ?) show belong to the Megatherium.

Immediately I saw this I thought they must belong to an enormous armadillo, living species of which genus are so abundant here.
3rd, The lower jaw of some large animal which, from the molar teeth, I should think belonged to the Edentata; 4th, some large molar teeth which in some respects would seem to belong to an enormous rodent; 5th, also some smaller teeth belonging to the same order.