The interesting question regarding the number and value of the anatomical resemblances and differences existing between Man and the rest of the Primates, has led to complete and detailed descriptions and comparisons such as those of Professors Owen, Duvernoy, and Gratiolet. But the valuable treatises of these authors yet leave much to be desired, because they relate only to the highest forms of the Order, and some distinctions resulting from such limited comparisons are apt to disappear, and the anatomical value of others to decrease when the survey is considerably extended. The memoir of Professor Vrolik § gives a somewhat more extended view, and Professor Huxley || has carried his observations and comparisons much further; but for the thorough investigation of the skeleton of the limbs of the Primates, nothing less than the careful examination of every bone throughout the whole series of forms is requisite, while man’s peculiarities can be justly appreciated only after a similarly extensive comparison.