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ADVERTISEMENT, 
The scientific publications of the National Museum consist of two 
series—Proceedings and Bulletins. 
The Proceedings, the first volume of which was issued in 1878, are 
intended primarily as a medium for the publication of original papers 
based on the collections of the National Museum, setting forth newly 
acquired facts in biology, anthropology, and geology derived there- 
from, or containing descriptions of new forms and revisions of limited 
groups. A volume is issued annually or oftener for distribution to 
libraries and scientific establishments, and, in view of the importance 
of the more prompt dissemination of new facts, a limited edition. of 
each paper is printed in pamphlet form in advance. The dates at 
which these separate papers are published are recorded in the table of 
contents of the volume. 
The present volume is the thirty-fourth of this series. 
The Bulletin, publication of which was begun in 1875, is a series of 
more elaborate papers, issued separately, and, like the Proceedings, 
based chiefly on the collections of the National Museum. 
A quarto form of the Bulletin, known as the “‘Special Bulletin,” has 
been adopted in a few instances in which a larger page was deemed 
indispensable. : 
Since 1902 the volumes of the series known as “‘Contributions from — 
the National Herbarium,” and containing papers relating to the 
botanical collections of the Museum, have been published as Bulletins. 
RIcHARD RATHBUN, 
Assistant Secretary, Smaithsoman Institution, 
In charge of the United States National Museum. 
OcToBER 1, 1908. 
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