study of the characters of the lachrymal bone of the face in vertebrates, especially in mammals, and its bearing upon various difficult problems in the evolution of the face from the primitive fishes of Paleozoic times to modern man.

Dr. Mook has published a series of articles in the Bulletin, presenting the results of his researches upon the osteology of living and extinct Crocodilia.

Professor Osborn continued actively his researches upon the Sauropod Dinosaurs, and especially upon the American Proboscidea.

Dr. Marjorie O'Connell, as special research assistant, gave approximately three months' time to studies upon the new and valuable collections of invertebrates secured by Mr. Barnum Brown in the Jurassic limestones of Cuba. Her report upon the collection will be completed in 1921.

During the autumn Dr. Matthew visited the principal scientific museums of Europe, with a view to renewing old relations of interchange and coöperation which had been Exchange and largely broken off by the war, and of developing Cooperation such new relations as might be advantageous. He With Foreign visited thirty-three museums in Sweden, Germany, Austria, Italy, Switzerland, France, Belgium and England, and made arrangements for exchange of publications, specimens, and casts, finding everywhere a most cordial reception, very friendly attitude towards the American Museum and high appreciation of its work.

Museums

The catalogue of photographs of fossil vertebrates contains 2,644 numbers to date, besides 292 photographs not yet catalogued. The additions during the year were

Photography chiefly Paleocene mammals.

The time of Mrs. L. M. Sterling was wholly taken during the year upon illustrations for researches by Professor Osborn. Of Mr. Erwin Christman's time approximately one-third was given to illustrations for monographs on Sauropoda and Titanotheriida by Professor Osborn, one-third to illustrating researches by Dr. Gregory and Dr. Mook, one-sixth to illustrations for various popular articles, and one-sixth to work in the exhibition hall and miscellaneous departmental routine.

EXISTING AND EXTINCT RACES OF MEN *

Exhibition

CLARK WISSLER, Curator

The Department of Anthropology has been occupied with the development of the larger plans presented in our last report. Of these, the most important were the exhibits for the Stone Ages of the Old World and those presenting the essential facts in the racial differentiation of men. Work upon these, with minor revisions and improvements in all parts of our exhibition series, it is unnecessary to report in detail, but it may be noted that the Jesup North Pacific Hall is now complete, except for a few totem poles and the end panels of the murals. Models of three typical Mayan temples have been made, showing both exterior and interior constructions, and one of the famous serpent columns from the Temple of the Tigers has been reproduced in full and will be painted like the original. These will greatly improve the instructive aspects of the Mexican Hall.

New
Collections

Our collections have been augmented through the generosity of many donors, a list of whom will be found under a separate head. A large collection of Palæolithic stone implements from Egypt was presented by Mr. August Heckscher. Mr. J. P. Morgan presented an unusually fine collection of Tibetan costumes and sacred objects brought to this country by the Rev. H. B. Marx. By a bequest from the late Herbert M. Lloyd, we received a large archæological collection from Iroquois sites in New York State. Finally, we may note an exceedingly interesting series of Palæolithic implements from North Africa selected by the distinguished French archæologist, Henri Breuil, and purchased from the Jesup Fund.

The internal work of the Museum has been largely interrupted by the absence of members of the staff. Since Septem

* Under the Department of Anthropology (see also pages 225 to 227).

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