Journal of Mammalogy, Vol. 63, No. 4 (Nov., 1982), pp. 709-716 (8 pages) ...
Serological data, and the information about phylogeny which they supply, can be used as the basis of a revised classification of the Marsupialia.
I TAKE Prof. Hubrecht to mean that the Didelphia (Metatheria) are descended from Eutheria, which is what Prof. Hill, in his own letter, refuses to admit.
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