NuMRlvR 31. XoVl'.Ml'.KR 20, I916. 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan. Published by the University. 



DESCRIPTIOX OF A NEW SPFXIES OF LA^JPREY 

 OF THE GENUS ICHTIIYO^IYZOX. 



By Tacor Riuc.iiard and Harold Ctmmixs. 



Lampre}'S representing the apparently new s[)ecies de- 

 scribed below were first observed and collected on May 23, 

 1905, spawning- in Mill Creek, a tributary of the Huron River 

 west of Ann Arbor, ^lichigan. Other specimens were later 

 taken in the Huron River, near Ann Arbor. The t}"pe material 

 is in the Museum of Zoology. University of Michigan. 



Ichthyomyzon fossor, new species. 



Diagnosis: Maximum length about 150 mm.; larvae at 

 transformation with maximum adult length ; buccal funnel 

 small ; disc teeth small and blunt, occasionally obsolete ; supra- 

 oral lamina with two small. l)lunt, well se]iarated cusps ; ante- 



SciENTiFic Papers of the University of Michigan No. 32. 



