Mr. VICTOR MINDELEFF was engraved during the fiscal year in the preparation of a report on the architecture of the Tusayan and Cibola groups of pueblos, which appears in the present volume. This report contains a description of the topography and climate of the region, in illustration of the influence of environment upon the development of the pueblo type of architecture. It also contains a traditionary account of the Tusayan pueblos and of their separate clans or phratries. A description in detail of the Tusayan group treats of the relative position of the villages and such ruins as are connected traditionally or historically with them. A comparative study is also made between the Tusayan and Cibola groups and between them and certain well preserved ruins in regard to constructive details, by which means the comparatively advanced type of the modern pueblo architecture is clearly established. Maps of the groups discussed and of the topography of the country and ground plans of houses and apartments were prepared to illustrate the report and give effect to the descriptions and discussion. Mr. COSMOS MINDELEFF devoted the early part of the fiscal year to the preparation of a report upon the exhibits of the Bureau of Ethnology and the Geological Survey at the Cincinnati Industrial Exposition, 1884; the Southern Exposition at Louisville, 1884; and the Industrial and Cotton Centennial Exposition at New Orleans, 1884-’85. The report includes a descriptive catalogue of the various exhibits. As these consisted largely of models, and as the locality or object represented by each model was described in detail, the report was lengthy. It was finished in October and transmitted to the Commissioner representing the Department of the Interior. During the remainder of the year the portion of time which Mr. Cosmos Mindeleff was able to devote to office work was employed in assisting Mr. Victor Mindeleff in the preparation of a preliminary report on the architecture of Zuñi and Tusayan. The portion assigned to him consists of an introductory chapter devoted to the traditionary history of Tusayan, arranged from material collected by Mr. A. M. Stephen, of Keam’s Canyon, Arizona. The modeling room has remained in charge of Mr. Cosmos Mindeleff. The preparation of a duplicate series of the models made in the last few years and now deposited in the National Museum was continued, a large portion of the time being given to that work. During the year the following models were added to this series: (1) model of Shumopavi, Tusayan, Arizona; (2) model of Etowah mound, Georgia; (3) models of Mashongnavi; (4) model of Zuñi; (5) model of Peñasco Blanco; (6) models of Etruscan graves, being a series to illustrate ancient Etruscan graves, from material furnished by Mr. Thomas Wilson.