Number 67 April 21, 1919 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



A NEW SPECIES OF TAPEWORM OF THE GENUS 



PROTEOCEPHALUS FROM THE PERCH 



AND THE ROCK BASS^ 



By George R. LaRue 



The collections on which this study is based were made by 

 Professor A. S. Pearse of the University of Wisconsin in the 

 course of investigations on the parasites of the fishes of Wis- 

 consin lakes and by the writer while making similar investiga- 

 tions on the fish of Douglas Lake in northern Michigan. Pro- 

 fessor Ward, of the University of Illinois, has also kindly 

 permitted a study of the tapeworms of the perch in his very 

 extensive collections. To Professors Pearse and Ward my 

 thanks are due for the use of their material. 



Proteocephalus pearsei, new species 



Diagnosis: Characters of the genus. Size small; total 

 length about 24 mm. ; scolex of variable size, as large as 0.3 

 mm. broad by 0.13 mm. long. Neck relatively long, 1.3 to 3 



^ Contribution from the Biological Station and the Department of Zoology, 

 University of Michigan. 



