Publications of the United States National Museum 



The sciemific publications of tlic l)nitcd States National Museum include two 

 series, Proceedings oj the United Stales .National Museum and United States National Museum 

 Bulletin. 



In these series are published original articles and monographs dealing with the 

 collections and work of the Museum and setting forth newly acquired facts in the 

 (iclds of Anthropology, Biology, History, Geology, and Technology. Copies of each 

 publication are distriljuted to libraries 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. 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, separate 

 publications consisting of monographs (occasionally in several parts) and volumes in 

 which arc collected works on related subjects. Bulletins are either octavo or quarto 

 in size, depending on the needs of the presentation. Since 1902 papers relating to 

 the botanical collections of the Museum have been published in the Bulletin series 

 under the heading Contributions from the United States National Herbarium. 



This work forms nimiber 218 of the Bulletin series. 



Remington Kellogg 

 Director, United States National Museum 



United States Government Printing Office, Washington, I960 



For sale by the Superintendent of Documents, U.S. Government Printing Office 



Washington 25, D.C. • Price $3.50 (cloth) 



