42 REPORT OF NATIONAL MUSEUM, 1907. 



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

 Tassin al«o made a larac luiniber of chemical analyses and established 

 the identity of 1128 minerals Ijelonging to the old collection. 



Doctor Bassler, assistant curator of strati<rraphic paleontology, 

 prepared ])apers on the Pliocene Bryozoa of Californin and lh(> De- 

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

 Chich. had nearly completed a monogi'ai)h 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 U. S. Geological Survey, was engaged in a study 

 of certain stratigraphic problems in the Southern A])palachians and 

 the Mississipi)i Valley. ^Ir. (lidlev continued his investigations on 

 Mesozoic fossil mannnals, 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. Mylo<iauJido\ Mr. 

 (irilmore has prepared and studied the type specimen of Morosaurus 

 ((f/ilis, and has begun to work up the material in the Marsh collection 

 rei)resenting Ca/yiptosaurus, with the view of revising and giving a 

 detailed description of the 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. H. Knowl- 

 ton, members of the staff of the U. S. Geological Surve3\ 



Twenty important lots of material from the several divisions of 

 the dei^artment 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. Kussia; 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. Aug. F. Foerste, of 

 Dayton, Ohio; Mr. Barnum Brown. Mr. A. Hussakoff, and Dr. O. P. 

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

 Berrv, of the ^Nlarvland Geological Survev. 



♦ 



EXPLORATIONS. 



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

 ment of anthropology, but important accessions w'ere obtained from 

 explorations by the Bureau of American Ethnology and from the 

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

 Arizona, under the direction of the Smithsonian Institution. Of 

 ])rivate explorations by which the department was benefited, those by 



