REPORT ON NATIONAL MUSEUM. 257 



offered to spend as much of his leisure time as possible in identifying 

 the species of that group contained in the Museum collections, and he 

 has already examined considerable material. Last winter the Museum 

 collection of fresh- water cray-fishes was sent to Prof. Walter Faxon, of 

 Harvard College, who is preparing a monograph upon that group. 

 During the past year much material on the same subject has beea re- 

 ceived from many American sources and forwarded to Cambridge for 

 his use. He proposes first to monograph the specimens belonging to 

 the Museum for one of the Museum reports. The Labrador collections 

 of Mr. W. A. Steams, made during the summer of 1882, were referred 

 to Professors Verrill and Smith, of Yale College, for examination. Be- 

 ports upon the crustaceans by Prof. S. I. Smith, and upon the echino- 

 derms and mollusks by Miss Katherine J. Bush,' have been published 

 during the year in the Proceedings of the Museum. It is proposed to 

 offer the Museum collections of foraminifera to Prof. L. A. Lee, of Bow- 

 doin College, for study. 



Distribution of duplicates and exchanges. 



The distribution of duplicate specimens selected from the large col- 

 lections received from the U. S. Fish Commission has been continued 

 through the year. Series III, or the educational series of duplicates, 

 prepared in 1882, has been entirely expended. Of Series II, the prep- 

 aration of which was completed in the spring of 1883, 31 sets have al- 

 ready been sent out. Of the London series, prepared for the purpose 

 of making exchanges in connection with the London Fisheries Exhibi- 

 tion, 5 sets have been disposed of, with suitable returns promised to the 

 Museum, and negotiations are now* pending regarding the remaining 

 five sets of the series. 



The institutions supplied with duplicate sets during 1883 were the 

 following : 



Series II, containing about 190 species each : Johns Hopkins Univer- 

 sity, Baltimore, Md.; Williams College, Williamstown, Mass.; College 

 of New Jersey, Princeton, N. J.; Dartmouth College, Hanover, N. H.; 

 Kentucky University, Lexington, Ky. ; College of New York, New York 

 City; Vassar College, Poughkeepsie, N. Y. ; Smith College, North- 

 ampton, Mass. ; Wellesley College, Wellesley, Mass. ; Hanover Col- 

 lege, Hanover, Ind. ; Tabor College, Tabor, Iowa ; Middlebury College, 

 Middlebury, Vt. ; University of North Carolina, Chapel Hill, N. C. ; 

 Cornell University, Ithaca, N. Y. ; Martha's Vineyard Summer Insti- 

 tute, Cottage City, Mass . ; Knox College, Galesbury, 111. ; Ohio Wes- 

 ley an University, Delaware, Ohio ; Wabash College, Crawfordsville, 

 Ind. ; University of the State of Missouri, Columbia, Mo. ; Massachu- 

 setts Agricultural College, Amherst, Mass.; Normal School, Cincin- 

 nati, Ohio; Owen College, Manchester, England; McGill University, 

 Montreal, Canada ; Queen's University, Kingston, Canada ; University 

 H. Mis. 69 17 



