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 fields of anthropology, 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 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. 
The present work forms No. 100, Volume 14, of the Bulletin series. 
Frank A. TAYLOR, 
Director, United States National Museum. 
It 
