ADVERTISEMENT 



The publications of the Museum of Zoology, University of Michigan, 

 consist of two series — the Occasional Papers and the Miscellaneous Publi- 

 cations. Both series were founded by Dr. Bryant Walker. Mr. Bradshaw 

 H. Swales and Dr. W. W. Newcomb. 



The Occasional Papers, publication of which was begun in 1913, serve 

 as a medium for the publication of brief original papers based principally 

 upon the collections in the Museum. The papers are issued separately to 

 hbraries and specialists, and, when a sufficient number of pages have been 

 printed to make a volume, a title page, index, and table of contents are sup- 

 plied to libraries and irtdividuals on the mailing list for the entire series. 



The Miscellaneous Publications include papers on field and museum 

 technique, monographic studies and other papers not within- the scope of 

 the Occasional Papers. The papers are published separately, and, as it is 

 not intended that they shall be grouped into volumes, each number has a 

 title page and, when necessary, a table of contents. 



Alexander G. Ruthven, 

 Director of the Museum of Zoology, 



University of Michigan. 



