Mr. G. R. Waterhouse on the Classification of Mammalia. 399 L. — Observations on the Classification of the Mammalia. By George R. Waterhouse, Esq., Assistant Secretary and Cu-rator to the Zoological Society, &c. The following observations are chiefly explanatory of the accom-panying tabular arrangement, in which I have attempted to group the various orders of the class Mammalia so as to display their mutual relations : In this table the orders are represented by circles : the numbers in the circles indicate the order of succession in which it appears to me the great groups should follow each other when it is ne-cessary to treat of them as though they formed a linear series* : * The extensive collection of Mammalia belonging to the Zoological Society was arranged by myself, towards the end of the year 1836, in the
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