AD\'ERTISEMEXT 



The publications of the Aluseum of Zoology, University of 

 ^Michigan, consist of two series — the Occasional Papers and the 

 Aliscellaneous Publications. Both series were founded and are 

 being supported by Dr. Bryant Walker, 'Sir. Bradshaw PI. 

 Swales and Dr. AA'. AW Xewcomb, except that the cost of the 

 illustrations and of distribution are borne by the University. 



The Occasional Papers, publication of Avhich was be- 

 gun 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 libraries and 

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

 printed to make a volume, a title page and table of contents 

 are supplied to libraries and individuals 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 

 table of contents. 



Ar^IvXANDER G. RUXHVEN, 

 Director of the jNIuseum of Zoology, 



University of ^lichigan. 



