40 REPORT OP NATIONAL MUSEUM, 1911. 



vey of Maryland, and Miss Mary Breen, collaborator of the division, 

 conducted researches on the mollusks of the District of Columbia. 

 Among others who visited the division for the purpose of examining 

 specimens and making comparisons were the Hon. T. H. Aldrich, of 

 Birmingham, Alabama ; Dr. H. A. Pilsbry, of the Academy of Nat- 

 ural Sciences of Philadelphia; Mr. Bryant Walker, of Detroit, 

 Michigan; Prof. G. D. Harris and Miss Carlotta Maury, of Cornell 

 University; and Mr. Anastasio Alfaro, of the Museo Nacional of 

 Costa Rica. 



Marine invertebrates. — The most important additions to this divi- 

 sion were received from the Bureau of Fisheries as transfers. Four 

 of these consisted of collections obtained during explorations by the 

 steamer Albatross, which had been worked up and made the subject 

 of official reports, as follows: Over 200 specimens of isopod crusta- 

 ceans, representing 67 species and including types of 3 new genera 

 and 38 new species, from the Philippine Islands, 1907-1910, deter- 

 mined by Dr. Harriet Richardson; about 150 specimens of medusae, 

 representing 26 species and including the types of 4 new species, 

 from the same region, determined by Dr. Alfred G. Mayer ; over 300 

 packages of hydroids, containing 99 species and including types and 

 cotypes of 5 species, from the northwestern Pacific Ocean, deter- 

 mined by Prof. C. C. Nutting; and over 800 specimens representing 

 42 species of siphonophores from the eastern Pacific Ocean, 1904 and 

 1905, determined by Dr. Henry B. Bigelow. The Indian Museum at 

 Calcutta, India, sent in exchange 165 specimens of decapod crusta- 

 ceans, representing 102 species, nearly all of which are new to this 

 Museum, and also 14 species of Indian and European bryozoans. 

 From the Museum d'Histoire Naturelle, Paris, France, there were 

 received as gifts two collections of isopod crustaceans, one obtained 

 by the Charcot expedition to the Antarctic Ocean, the other from the 

 explorations of the French steamers TravaiUeur and Talisman in 

 1880 to 1883, both worked up and described by Dr. Harriet Rich- 

 ardson. Collections of shrimps and crinoids were also obtained from 

 the same museum in exchange. The Zoological Museum at Copen- 

 hagen, Denmark, transmitted, likewise in exchange, 34 species of 

 crinoids, represented by 92 specimens. Dr. James M. Flint, United 

 States Navy (retired), presented to the Museum 347 microscopic 

 slides of foraminifera, selected chiefly from dredgings by the Bureau 

 of Fisheries steamer Albatross from 1883 to 1887, and mounted and 

 identified by himself. Dr. Charles B. Wilson and Dr. E. A. Andrews, 

 while at the Johns Hopkins laboratory, Montego Bay, Jamaica, 

 during the summer of 1910, kindly collected for the Museum in that 

 locality about 250 lots of crustaceans, both marine and fluviatile. In 

 the collection received from the Imperial University of Tokyo 

 through Prof. E. S. Morse are a large number of miscellaneous 



