Number 146 March 22, 1924 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 

 Ann Arbor, Michigan Published by the University 



TWO NEW SPECIES OF CISCO FROM THE 

 GREAT LAKES^ 



By Walter Koelz 



Leucichthys alpenae, new species 



Argyrosomus prognatlius Evermann and Smith, Rept. U. S. Comm. Fish. 



1894 (1896), p. 314-317 (in part). 

 Leucichthys johannae Jordan and Evermann, Bull. Bur. Fish., 29, 1909 



(1911), p. 24-25 (in part). 



This form, currently known as the "longjaw", is one of the 

 largest species of Leucichthys found in the Great Lakes. Indi- 

 viduals not infrequently attain a length of 38 cm. (15 inches) 

 and a weight of two pounds. The longjaws are well-flavored 

 and moderately fat and are in demand by fish-smokers. The 

 species occurs most abundantly at depths of less than 60 fath- 

 oms and is generally distributed throughout Lake Michigan and 

 Lake Huron, including Georgian Bay, where suitable condi- 

 tions obtain. 



iThese descriptions are published with the permission of the U. S. 

 Commissioner of Fisheries. 



