RACES. Internal Internal capacity. capacity. Mean. Mean. MODERN WHITE RACES-- Teutonic group 92 92 Pelasgic " 84 } Celtic " 87 } 88 Shemitic " 89 } ANCIENT PELASGIC 88 MALAYS 85 } 83-1/2 CHINESE 82 } NEGROES (AFRICAN) 83 83 INDOSTANESE 80 } FELLAHS (modern Egyptians) 80 } 80 EGYPTIANS (ancient) 80 } AMERICAN GROUP-- Toltecan family 77 } 79 Barbarous tribes 84 } HOTTENTOTS 75 } 75 AUSTRALIANS 75 } Such has been, through several thousand years, the incessant commingling of races, that we are free to admit that absolute accuracy in measurements of crania cannot now be attained. Yet so constant are the results in contrasting groups, that no unprejudiced mind can deny that there is a wide and well-marked disparity in the cranial developments of races. B. As the discussion stands at the present day, we may assume that the scientific world is pretty equally divided on the question of unity of the human family, and the point is to be settled by facts, and not by names. Natural history is a comparatively new and still rapidly progressing science, and the study of man has been one of the last departments to attract serious attention. Blumenbach and Prichard, who may be regarded among the early explorers in this vast field, have but recently been numbered with the dead; and we may safely assert that the last ten years have brought forth materials which have shed an entirely new light on this subject. Mr. Agassiz, Dr. Morton, Prof. Leidy, and many other naturalists of the United States, contend for an original diversity in the races of men, and we shall proceed to give some of the reasons why we have adopted similar views. Two of the latest writers of any note on the opposite side are the Rev. Dr. Bachman, of Charleston, and M. Flourens, of Paris; and as these gentlemen have very fully travelled over the argument opposed to us, we shall take the liberty, in the course of our remarks, to offer some objections to their views. The great difficulty in this discussion is, to define clearly what meaning should be attached to the term _species_; and to the illustration of this point, mainly, will our labors be confined. _Genera_ are, for the most part, well defined by _anatomical_ characters, and little dispute exists respecting them; but no successful attempt has yet been made to designate _species_ in this way, and it is by their _permanency of type alone_, as ascertained from written or monumental records, that our decision can be guided. SPECIES.