ADVEKTISEMEXT. 



The scientiric publications of the National Museinn consist of tvvo 

 series — the Bulletin and the Proceedings. 



The Bulletin^ publication of which was bej^un in 1875, is a series 

 of more or less extensive works intended to illustrate the collections 

 of the U. S. National Museum and, with the exception noted below, 

 is issued separately. These bulletins are monoo-raph ic in scope 

 and are devoted principally to the discussion of larg-e zoological and 

 botanical groups, faunas and floras, bi))liooraphies of eminent natural- 

 ists, reports of expeditions, etc. Thej' are usually of octavo size, 

 although a quarto form, known as the Special Bulletin, has been 

 adopted in a few instances in which a larger page was deemed indis- 

 pensable. 



This work forms No. H2 of the HuUetin series. 



Since ll>02 the volumes of the series known as ''Contributions from 

 the National Herbarium," and containing papers relating to the botan- 

 ical collections of the Museum, have been published as bulletins. 



The Proceedings^ the first volume of which was issued in 1878, are 

 intended as a medium of pu])lication of brief original papers based 

 on the collections of the National ^Museum, and setting forth newly 

 acquired facts in biology, anthropolog}', 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 impor- 

 tance of the more prompt dissemination of new facts a limited edition 

 of each paper is printed in pamphlet form in advance. 



RiCUAKD KaTMHUN, 



AfiislMant Secretary^ SniULsonlan Institution^ 

 In Charge of the United Strifes National Miiseum. 



Washington, U. S. A., January 16^ 1909. 



Ill 



