REPORT OF NATIONAL, MUSEUM, 1921. 75 



Commander C. D. Thurber, United States naval station, Pearl Har- 

 bor, Oahii. Hawaii ; and Capt. Edward L. Beach, commandant of the 

 Mare Island Naval Station, Calif. As noted in previous reports, the 

 study of fossil mollusks is so dependent on that of the recent forms 

 that the paleontologists of the Geological Survey, notably Dr. AY. P. 

 Woodring, Dr. Julia A. Gardner, Mr. W. C. Mansfield, and Dr. C. W. 

 Cooke spent considerable time studying material in the division of 

 mollusks. 



The National Herbarium, as in previous years, is used frequently 

 by many members of the scientific staffs of the Department of Agri- 

 culture. In particular Dr. S. F. Blake, Dr. C. R. Ball, Prof. C. V. 

 Piper, and Dr. W. E. Safford have given attention to several critical 

 groups. Mr. Ivar Tidestrom has continued his work upon the plants 

 of Utah and Nevada. 



RESEARCTIES ELSEWHERE AIDED BY MUSEUM MATERIAL 



The liberal policy of the Museum in keeping its collections and 

 laboratories open to visiting specialists and in sending out its mate- 

 rial to scientific workers in this and other countries, as outlined in last 

 year's report, was continued during the present year to the mutual 

 advantage of both parties. 



A nimiber of prominent students visited the various divisions for 

 longer or shorter periods, as shown by the following list : Mr. Rem- 

 ington Kellogg used the cetacean and other osteological mammalian 

 material ; Mr. Herbert Lang, American Museum of Natural History, 

 studied African squirrels ; Mr. H. E. Anthony, of the same museum. 

 South American mammals ; Mr. R. M. Anderson, Geological Survey of 

 Canada, specimens of caribou. The bird collections, besides being 

 freely used by members of the staff of the Biological Survey, were 

 examined b}^ Dr. W. B. Alexander, Perth, West Australia; Dr. 

 Stanley C. Ball, Bishop Museum, Honolulu, Hawaii; Maj. Allan 

 Brooks, Okanagan Landing, British Columbia; Dr. H. C. Bryant, 

 Museum of Vertebrate Zoology, Berkeley, Calif. ; Mr. James P. 

 Chapin, American Museum of Natural History, New York; Mr. 

 H. K. Coale, Highland Park, 111.; Mr. Donald R. Dickey, Pasadena, 

 Calif. ; Dr. Jonathan Dwight, New Y^ork City ; Mr. J. H. Fleming, 

 Toronto, Canada : Dr. Joseph Grinnell, director of Museum of Ver- 

 tebrate Zoology, Berkeley, Calif. ; Mr. Ludlow Griscom, American 

 Museum of Natural History, New York; Mr. A. K. Haagner, Pre- 

 toria, Transvaal; Mr. Romeyn B. Hough, Lowville, N. Y., Rev. 

 H. W. Hubbard, Peking, China; Mr. M. J, Kelly, Everhart Museum, 

 Scranton, Pa.; Mr. F. H. Kennard, Newton Center, Mass.; Mr. H. 

 Matsumoto, N. E. Imperial L'^niversity, Sendai, Japan; Mr. W. DeW. 

 Miller, American Museum of Natural History, New York ; Mrs. M. M. 

 Nice, Norman, Okla. ; Dr. W. H. Osgood, Field Museum of Natural 



