Number 104. Deckmber 31, 1921. 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



DESCRIPTION OF A NEW CISCO FROM THE 

 GREAT LAKES 



By Walter Koelz 



Leucichthys kiyi, new species^ 



In the course of an investigation of the coregonine fishes 

 of the Great Lakes conducted by the writer for the United 

 States Bureau of Fisheries, many individuals of an unde- 

 scribed species belonging to the group currently known as 

 Leucichthys or Argyrosomus were obtained from the nets of 

 the commercial ''chub'' fishermen of Lake Michigan. The 

 species is so distinct from its allies that it is recognized by 

 the fishermen, a distinction which few of the other species of 

 cisco share, and is termed by them "kiyi," "mooneye" or 

 "waterbelly." The species attains less size than any of the 



1 This description is published with the permission of the U. S. 

 Commissioner of Fisheries. 



