[79] We have just received the first number (Jan.-Feb., 1922) of tomo I, época 4ª, of the _Anales del Museo Nacional de Arqueología, Historia y Etnografía_ of Mexico, which have long been interrupted. In it is announced the forthcoming appearance of a paper relating to this subject, “Máscara con Mosaicos de Turquesas.--Dictámenes Periciales.” It is to be hoped that the authenticity of this object will be cleared of all suspicion by the proposed study. [80] On this subject consult Saville, Precolumbian Decoration of the Teeth in Ecuador, etc., _American Anthropologist_, N. S., vol. 15, 1913; reprinted as _Contributions from the Heye Museum_, vol. I, no. 2, 1913. [81] David Casares, A Notice of Yucatan with Some Remarks on its Water Supply, _Proceedings of the American Antiquarian Society_, pp. 207-230, Oct., 1905. [82] Diego de Landa, Historia de las Cosas de Yucatan, edition of Juan de Dios de la Rada y Delgado, p. 84, Madrid, 1881. [83] Casares, op. cit., p. 226. [84] William H. Holmes, Archeological Studies among the Ancient Cities of Mexico, _Anthropological Series, Field Columbian Museum_, vol. I, no. 1, Chicago, 1895. Part I, Monuments of Yucatan, Section on Chichen Itza, p. 137. [85] Seler, Codex Vaticanus No. 3773. Elucidation published at the expense of the Duke of Loubat, Berlin and London, 1902-1903. In this study Seler treats at length of the God Xipe Totec. [86] Sahagun, op. cit., tomo I, lib. I, cap. XVIII, p. 28. [87] The two mosaic masks on the sculptured wall at Chichen Itza are taken from the drawings on pl. 46 and 47 of the great work of Alfred P. Maudslay published as part of _Biologia Centrali-Americana: or Contributions to the Knowledge of the Fauna and Flora of Mexico and Central America_, edited by F. Ducane Godman and Osbert Salvin. Archæology, vol. III (Plates). London, 1895-1902. The crowns are from pl. 38, 49-59. The crown with the feathers is from the doorway column of Temple A, of the Ball Court. [88] The first extended study of Mexican turquois mosaics, based especially on some of the specimens now in the British Museum, was made by E. T. Stevens and published in his Flint Chips, pp. 324-328, London, 1870. Read’s paper did not appear until 1895. [89] See Maudslay’s edition of Bernal Díaz, op. cit., vol. I, app., pp. 299-302. Maudslay gives photographs of the two wooden masks in the British Museum, which he calls “Masks of Quetzalcoatl,” and of the skull mask which he denominates “Mask of Tezcatlipoca.” [90] See List of Works following. [91] See translation in Saville, Goldsmith’s Art in Ancient Mexico, pp. 126-127. [92] See List of Works following. [93] See List of Works following. Our illustration is a photograph of the colored lithographic plate of Uhle. [94] Zelia Nuttall, On Ancient Mexican Shields, _Separat-Abdruck aus Internationales Archiv für Ethnographie_, Bd. V, 21 pp., Leiden, 1892.