The author has in mind to refer only to those works which bear directly on the most essential statements made and, necessarily, to but a part of these. In many cases only books which are most easily available have been used. The author has intentionally quoted chiefly works in English, where these exist, and when using foreign authorities has translated the statements. It must be clearly understood that the references are given for the facts rather than the theories they contain. In no case, unless specifically stated, is the author committed to the conclusions drawn in the works cited. In order to present all sides, authorities who differ in viewpoint are sometimes listed, the reader being left to make his own decision of the case. It is hoped that the references will be of assistance to students of anthropology and to those who care to inquire further into the subjects under discussion. Where an author is quoted frequently or for more than one book, he is referred to merely by name; the book is given by number immediately following. Its full title may be ascertained in the bibliography. DOCUMENTARY SUPPLEMENT _PART I_ INTRODUCTION Page xix : line 22. Immutability of somatological or bodily characters. Charles B. Davenport, pp. 225 _seq._ and 252 _seq._: William E. Castle, 1, pp. 125 _seq._; Frederick Adams Woods, 3, p. 107; and Edwin G. Conklin, 1, pp. 191 _seq._ See the note to p. 226, 7 for a quotation from Conklin bearing on this point.