Publications of the United States National Museum 



The scholarl>- and scientific publications of the United States National Miiseuai 

 include two scries, Proceedings of the I'nited States National Museum and United States 

 National Museum Bulletin. 



In these series, the Museum publishes original articles and monographs dealing 

 with the collections and work of its constittient museums — The Museum of Natural 

 History and the Museum of History and Technology — setting forth newly acquired 

 facts in the fields of anthropology, biology, history, geology, and teclmology. Copies 

 of each publication are distributed to libraries, to cultural and scientific organizations, 

 and to specialists and others interested in the diflferent subjects. 



The Proceedings, begun in 1878, are intended for the publication, in separate 

 form, of shorter papers from the Museum of Natural History. These are gathered 

 in Nolumes. octa\o in size, with the publication date of each paper recorded in the 

 table of contents of the Nolume. 



In the Bulletin series, the first of which was issued in 1875, appear longer, sepa- 

 rate publications consisting of monographs (occasionally in several parts) and vol- 

 mnes in which are collected works on related subjects. Bulletins are either octavo or 

 quarto in size, depending on the needs of the presentation. .Since 1902 papers re- 

 lating to the botanical collections of the Museum of Natural History ha\e been 

 published in the Bulletin series under the heading Contrilnitions from the United States 

 National Herbarium, and since 1959, in Bulletins titled '"Contribtuions from the Museum 

 of History and Technology," ha\e been gathered shorter papers relating to the 

 collections and research of that Museum. 



The present collection of Contributions, Papers 59-64, comprises Bulletin 250. 

 Each of these papers has been previously published in separate form. The year of 

 publication is shown on the last page of each paper. 



Fr.ank a. T.^ylor 

 Director, United States National Museum 



