University of Michigan 



Seven specimens measure 



T't/'^ Locality: Tributary of Swan Creek, about five miles 

 east of Aetna, Hickman County, Tennessee. Collected May, 

 1907, by A. A. Hinkley. 



Remarks : The shell belongs to the group characteristic of 

 Central Tennessee, the leading representative of which may 

 be set down as Goniobasis laqueata Say. It differs from Gon- 

 iobasis currcyana Lea, which, however, it approaches, in being 

 acutely conical and in having microscopical revolving lines. 

 It has not the bands of G. diUtonii Lea, and is thicker and 

 more attenuate. It is thicker, larger and the ribs are more 

 strongly developed than in the case of G. thorntonii Lea. The 

 shell more nearly resembles certain light colored specimens of 

 Goniobasis plicifera Lea than any other species east of the 

 Pacific coast region. 



At the time the shells were collected they were identified as 

 Goniobasis athleta Anth. Mr. Calvin Goodrich pointed out 

 my error of determination and I have the pleasure of giving 

 his name to this fine Goniobasis. The type specimen is in the 

 Museum of Zoology, University of Michigan; co-types in my 

 cabinet ; author's examples in the National Museum, Philadel- 

 phia Academy of Natural Sciences, and in the collection of 

 Dr. Bryant Walker of Detroit. 



