EEPORT OF NATIONAL MUSEUM, 1909. 49 



changes in the exhibition series have been made. The specimens 

 were, however, removed from the shelves and the entire exhibit 

 cleaned and rearranged. The work of renumbering and cutting down 

 the study series has been carried on as usual, and all the collections 

 from the Potomac formation have been thus revised. 



DISTRIBUTION AND EXCHANGE OF SPECIMENS. 



Eighty-two regular sets, consisting of geological specimens only 

 to the number of 7,739, were distributed during the year for educa- 

 tional purposes. In addition about 1,300 specimens of geology, 

 marine invertebrates, and fishes were sent out in special sets for the 

 same purpose. There were lent for study to specialists not officially 

 connected with the Museum staff 18,412 specimens from the depart- 

 ment of biologj^ and 57G specimens from the department of geology. 



Exchanges were carried on as usual with scientific institutions 

 and individuals, and for this purpose 10,084 duplicate specimens 

 were used, 3,552 being geological, 530 anthropological, and 6,002 

 zoological and botanical. 



The extent of the exchange relations with institutions abroad is 

 indicated by the following list: The British Museum of Natural 

 History, London, England; the University of Glasgow, Scotland; 

 the Museum d'Histoire Naturelle, Elbeuf, France; the Konigl. 

 Zoologisches Museum, Berlin, and the Konigl. Botanischer Garten 

 und Museum, Dahlem, Steglitz bei Berlin, Germany; the Jardin 

 Botanique de TEtat, Brussels, Belgium; the Botani'sk Museum and 

 the Zoologisches Museum, Copenhagen, Denmark; the Xaturhistor- 

 iska Riksmuseum, Stockholm, and the Botanischer Garten, Upsala, 

 Sweden; the Bergen Museum, Bergen, Norway; the Rijks Museum 

 van Natuurlijke Histoire, Leiden, Holland ; the Botanisches Museum, 

 Universite de Lausanne, Switzerland; the Museo de Ciencias Nat- 

 urales, ]\Iadrid, Spain ; the Ilegia Museo Zoologico, Turin, Italy ; the 

 K. K. Naturhistorisches Ilofmuseum, Vienna, Austria ; the Indian 

 Museum and the Royal Botanic Garden, Calcutta, India ; the Royal 

 Botanic Gardens, Peradeniya, Ceylon; the Department of Agricul- 

 ture, Buitenzorg, Java ; the Selangor State Museum, Kuala Lumpur, 

 Federated Malay States. 



Exchanges were also carried on with the following individuals in 

 foreign countries: Prof. W. A. Herdman, Liverpool, Mr. Edward 

 Lovett, Croydon, Mr. R. Shelford, Oxford, and Mr. Alfred O. 

 "Walker, Ulcombe, Maidstone, Kent, England ; Mr. AVilliam Eagle 

 Clarke, Edinburgh, Scotland ; Mr. Stanislas Meunier and Dr. Emile 

 G. Racovitza, Paris, France; Professor von Hansemann, Berlin, and 

 Count Hans von Berlepsch, Cassel, Germany; Dr. J. H. Bonnema, 

 The Hague, Holland; Mr. Friedrich Hendel, Vienna, Austria; Prof. 



