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74 I do not think that any valid objections can be raised as to the accuracy of the statements already cited; but in case such should be brought forward, I will now produce one authority which I am sure Professor Owen will regard as irrefragable. This is the third volume of the Catalogue of the Hunterian Collection, where, at p. 34, I find the following passages:—

In the year 1842, Dr. Macartney read a paper "On the Minute Structure of the Brain of the Chimpanzee, and of the Human Idiot, compared with the perfect Brain of Man," before the Royal Irish Academy; and the essay, accompanied by two plates, is published in the 19th volume of the Transactions of that Academy. At p. 323, Dr. Macartney says—"The proportions of the cerebellum to the cerebrum were exactly as in man." "The parts in the lateral ventricles corresponded very nearly with the same in man." The figure of the upper surface of a plaster cast of the brain of this Chimpanzee, in Plate I., distinctly exhibits the posterior cerebral lobes projecting beyond the cerebellum.

The "Verhandelingen over de Natuurlijke Geschiedenis der Nederlandsche overseesche Bezittingen," pp. 39–44, contains a valuable memoir, 4 by Dr. Sandifort, on the anatomy of the orang, in which, at p. 30, I find the following distinct statement:—

Vrolik, in the valuable article, "Quadrumana," contributed by him to "Todd's Cyclopædia" (1847), expressly affirms (p. 207), that, in the orang, the cerebral hemispheres "are protracted behind the cerebellum." And M. Isidore Geoffroy S. Hilaire ("Seeonde Mémoire sur les Singes Americanes," Archives du Musèum, 1844) draws particular attention to the fact, that in the Saimiri, Chrysothrix (Saimiris, I. G. St. H.) ustus, a platyrhine monkey, and therefore far more distant from man than the