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Table 2. Possible systematic equivalences between:
Formica Corsi (1900)	Present paper (1992)
"reptiles (Aligatores) gigantescos" Toxodon platensis Mastodon giganteum (sic) "carniceros" Glyptodon giganteum? (sic) Glyptodon tuberculatus Megatherium americanum Mylodon robustus	Testudines indet. Toxodon platensis Gomphotheriidae indet. ?Arctodus sp. Doedicurus clavicaudatus Panochthus sp. Megatherium americanum Lestodon armatus et Glossotherium sp.

The only systematic information previous to this Catalogue on the collection was given by Formica Corsi (1900:298) who identified the following taxa as given in Table 2. The right column shows our own identifications of what we think corresponds to the same material.