68 REPORT OF NATIONAX, MUSEUM, 1925 



the Ohio State University. Miss Grace Sandhouse spent 10 days 

 studying bees of the genus Osmia. The division of marine inverte- 

 brates, as in past years, has rendered assistance to members of the 

 scientific staff of the Biological Survey in the identification of 

 invertebrates; to the Zoological Division of the Bureau of Animal 

 Industry in the classifying of invertebrate hosts of animal parasites ; 

 and to the Federal Horticultural Board in identifying invertebrates 

 found associated with various plant importations. Dr. C. B. Wil- 

 son, specialist on parasitic and free-swimming copepods worked on 

 collections of the latter in connection with a report he is preparing. 



In the division of moUusks the following out of town visitors 

 spent a short time in the study of specimens: William J. Clench, 

 University of Michigan, Ann Arbor, Mich.; Dr. Carl C. Engberg, 

 University of Nebraska, Lincoln, Nebr. ; Herbert N. Lower, Long 

 Beach, Calif.; Curtis A. Perry, Bridgton, Me.; Walter F. Webb, 

 Rochester, N. Y. ; Robert C. Miller, University of California, 

 Berkeley, Calif.; J. L. Madden, Shinnston, W. Va. Dr. C. W. 

 Cooke, Dr. W. P. Woodring, Dr. Julia A. Gardner, and W. C. 

 Mansfield, of the United States Geological Survey, worked on 

 Tertiary fossils and have constantly consulted the recent collections 

 for comparison. In the section of corals Dr. J. Edward Hoff- 

 meister, professor of zoology in the University of Rochester, N. Y., 

 spent several months in the study of certain groups. Dr. H. 

 Boschma, assistant in the zoological laboratory of the University 

 of Leyden, Holland, a Nederland-American Foundation student, 

 examined certain type material. Dr. T. Wayland Vaughan spent 

 several days studying corals in the Museum during the week of the 

 meeting of the National Academy of Sciences. In the section of 

 helminths Miss Eloise B. Cram prepared " Nematods of the sub- 

 orders Strongylata, Ascaridata and Spirurata (exclusive of Fila- 

 roidea) parasitic in Birds " and submitted the manuscript to George 

 Washington University as a thesis in part fulfilment for the degree 

 of doctor of philosophy. Reference has already been made to Miss 

 Deichmann's studies on holothurians, in the division of ecliinoderms. 



A large number of professional botanists,, most of them interested 

 in herbarium management and studies of the local flora, visited the 

 herbarium during the year. Those who prosecuted investigations 

 in the herbarium, are as follows: Dr. O. Stapf, late keeper of the 

 herbarium. Royal Botanic Gardens, Kew, England (several genera 

 of grasses) ; Maj. T, F. Chipp, assistant director. Royal Botanic 

 Gardens, Kew (grasses) ; Dr. Hugo Gliick, University of Heidel-. 

 berg, Heidelberg, Germany (morphology of water plants and 

 swamp plants) ; Dr. I. H. Burkill, formerly director of the Botanic 

 Garden, Singapore (Dioscorea) ; Dr. I. B. Pole-Evans, Chief, 

 Division of Botany, Department of Agriculture, Pretoria, Union 



