Publications of the United States National Museum 



The 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 are published original articles and monographs dealing 

 with the collections and work of the Museum and setting forth newly acquired 

 facts in the field of anthropology, biology, geology, history, and technology. 

 Copies of each publication are distributed to libraries and scientific organi- 

 zations and to specialists and others interested in the various 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 are 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 number 290 of the Bulletin series. 



FRANK A. TAYLOR 

 Director, United States National Museum 



U.S. GOVERNMENT PRINTING OFFICE 

 WASniNGTON : 1968 



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

 Washington, D.C. 20402 - Price $1 (paper cover) 



