^{page 457 note 1} Revista Argentina, I. p. 314.

^{page 457 note 2} The examination of a great number of lower jaws and detached teeth of the genera Abderites, Acdestis and Eponorthus, which I owe to the kindness of Señor Ameghino, shows that the molars in these genera do not agree, either in number or in form, with those of Neoplagiaulax. They greatly resemble those of the Australian Hypsiprynmidsæ, and they are proved to be genuine Marsupials by the incurved angle of the lower jaws. Ameghino also acknowledges them (Revue génér. des Sciences, 1893, p. 77Google Scholar) as Diprotodout Marsupials, to which he also further assigns Plagiaulax, Neoplagiaulax and Ptilodus.

^{page 460 note 1} The genera marked with * appear for the first time; those with † become extinct, and those marked *† appear in the Lower Miocene and likewise die out in the same.

^{page 461 note 1} The genera to which the letter (E.) is affixed occur also in the Miocene of Europe. For the other marks see the note on p. 460.

^{page 462 note 1} See note on p. 460.

^{page 464 note 1} The genera to which the letter (E.) is affixed occur also in Europe.

^{page 465 note 1} See note on p. 460.

^{page 467 note 1} The genera marked with (E) also occur in the European Miocene; those with (E*) in the European Pliocene.