Publications of the United States National Museum 



The scholarly and scientific publications of the United States National Museum 

 include two series, Proceedings of the United 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 constituent 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 technology. Copies 

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

 and to specialists and others interested in the different 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 volumes, octavo in size, with the publication date of each paper recorded in the 

 table of contents of the volume. 



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- 

 umes 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 have been 

 published in the Bulletin series under the heading Contributions from the United 

 States National Herbarium, and since 1959, in Bulletins titled "Contributions from 

 the Museum of History and Technology," have been gathered shorter papers relating 

 to the collections and research of that Museum. 



The present collection of Contributions. Papers 45-51, comprises Bulletin 241. 

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

 publication is shown on the last page of each paper. 



Frank A. Taylor 

 Director, United States National Museum 



