42 REPORT OF NATIONAL MUSEUM, 1907. . 



by the Coon Butte crater. Arizona, which he visited in May. Mr. 

 Tassin also made a large number of chemical analyses and established 

 the identity of 128 minerals belonging to the old collection. 



Doctor Bassler, assistant curator of stratigraphic paleontology. 

 prepared papers on the Pliocene Bryozoa of California and the De- 

 vonian Bryozoa of Wisconsin, and, in conjunction with Mr. E. O. 

 LTlrich, had nearly completed a monograph on the American Ostra- 

 coda. At the close of the year he was at work on a collection of Rus- 

 sian Ordovician Bryozoa received from Dr. A. von Michwitz, and, in 

 cooperation .with the I . S. Geological Survey, was engaged in a study 

 of certain stratigraphic problems in the Southern Appalachians and 

 the Mississippi Valley. Mr. Gidley continued his investigations on 

 Mesozoic fossil mammals, completing his studies on the fossil horse, 

 as represented in the National Museum and the American Museum 

 of Natural History, and on a new fossil rodent, Mylogaulidce. Mr. 

 Gilmore has prepared and studied the type specimen of Morosaiwus 

 agilis, and has begun to work up the material in the Marsh collection 

 representing Camptosaums, with the view of revising and giving a 

 detailed description of (he genus. In paleobotany no researches were 

 carried on directly by the Museum, although work was constantly in 

 progress at the Museum by Mr. David White and Dr. F. II. Knowl- 

 ton, members of the stall' of the U. S. Geological Survey. 



Twenty important lots of material from the several divisions of 

 the department of geology were lent to individuals and establishments 

 elsewhere to aid in investigations, and a number of specialists were 

 given facilities at the Museum to conduct researches in furtherance 

 of their own studies. Among the latter the following may be men- 

 tioned: Dr. George Mikhailowski, Director of the University Mu- 

 seum, Dorpat, Russia; Dr. Constantine Pfaffius, attache to the gov- 

 ernor-general of the Amur Territories; Miss Mary W. Porter, of 

 Oxford, England; the Hon. Frank- Springer, of New Mexico; Prof. 

 R. T. Jackson, of Harvard University; Prof. .Vug. F. Foerste, of 

 Dayton. Ohio; Mi-. Barnum Brown, Mr. A. Hussakoff, and Dr. ( ). P. 

 I lay. of the American Museum of Natural History, and Prof. E. W. 

 Berry, of the Maryland Geological Survey. 



EXPLORATIONS. 



No held work was carried on by members of the staff of the depart- 

 ment of anthropology, hut important accessions were obtained from 

 explorations by the Bureau of American Ethnology and from the 

 excavations made by Dr. J. W. Fewkes at the Casa Grande ruin in 

 Arizona, under the direction of the Smithsonian Institution. Of 

 private explorations by which the department was benefited; those by 



