40 EEPORT OF NATIONAL MUSEUM, 1910. 



of Arenicola glacialis Murdoch. Prof. William E. Ritter, of the 

 University of California, spent some time at the Museum in the study 

 of the Atlantic ascidians, in preparation for his monograph of the 

 simple ascidians of the Pacific Ocean. Dr. E. A. Andrews, of Johns 

 Hopkins University, examined the shrimps of the family Eryonidae, 

 the anatomy of which he is investigating. 



Over 315 lots of specimens of marine invertebrates were sent to 11 

 naturalists for study and examination, besides 1,100 microscopic 

 slides of foraminifera forwarded to Dr. J. A. Cushman. The prin- 

 cipal sendings were of Ostracoda and Cladocera, to Mr. R. W. Sharpe, 

 of Brooklyn, New York, who will report upon them to the Museum; 

 of amphipod crustaceans, to Dr. A. S. Pearse, of the University of 

 Michigan; of amphipods of the Connecticut coast, to Dr. B. W. 

 Kunkel, of the Sheffield Scientific School, who requested them for use 

 in a report for the State authorities; and of simple ascidians, to 

 Dr. W. E. Ritter. 



With reference to the section of helminthological collections, it is 

 reported that Dr. B. H. Ransom completed a study of all known 

 species of nematode worms, about 50 in number, which are parasitic 

 in the alimentary canal of cattle, sheep, and other ruminants, based 

 chiefly on the material in the Bureau of Animal Industry collection. 

 Several of the species were found to be new. Mr. M. C. Hall, also 

 of the Bureau of Animal Industry, gave some attention to a new 

 species of tapeworm which infests the dog. Mr. Howard Crawley, 

 of the same bureau, described a species of Trypanosome common in 

 American cattle. Investigations by Dr. Charles Wardell Stiles related 

 mainly to the prevention of typhoid fever, and the hookworm and 

 alHed diseases. Dr. Joseph Goldberger, of the Hygienic Laboratory, 

 studied a number of flukes, or distomatous worms, from various 

 sources, among which he discovered some new species. A few loans 

 of parasitic worms were made, and some specimens from the collec- 

 tion were used for class demonstration at the Naval Medical School 

 and Georgetown University. 



Plants. — The number of plants added to the National Herbarium 

 was 33,477, received in 374 accessions. Especially noteworthy were 

 several thousand specimens from the Smithsonian African Expe- 

 dition, mainly collected and prepared by or under the direct super- 

 vision of Dr. E. A. Mearns. The transfers from the Department of 

 Agriculture amounted to 3,371 specimens, furnished by the Bureau 

 of Plant Industry, the Biological Survey, the Forest Service, and 

 the Bureau of Entomology. Through the medium of exchange 

 over 8,000 specimens were received, the largest contributor in this 

 connection being the Bureau of Science at Manila (to the extent of 

 5,670 plants), followed by the New York Botanical Garden, the 

 Field Museum of Natural History, and the K. K. Naturhistorisches 



