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 axe published original articles and mono- 

 graphs dealing with the collections and work of the Museum 

 and setting forth newly acquired facts in the fields of anthro- 

 pology, biology, geology, history, and technology. Copies of 

 each publication are distributed to libraries and scientific 

 organizations 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 mono- 

 graphs (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 pres- 

 entation. Since 1902, papers relating to the botanical collec- 

 tions of the Museum have been published in the Bulletin 

 series under the heading Contributions from the United 

 States National Herbarium. 



This work forms number 285 of the Bulletin series. 



Frank A. Taylor 

 Director, United States National Museum 



IV 



