344 Quarterly /oiinial of Coiichology. 



somewhat close to the ground. It may most easily be mistaken 

 for Pupa pentodon, but is much smaller and proportionably broader 

 and its aperture is obstructed by a less number ot denticles than 

 are usually seen in specimens of the latter species. 



There are specimens in my own cabinet and in the collections 

 of Jas. Lewis, M.D., Mohawk, N.Y., and of the Cincinnati Soc. of 

 Nat. Hist. 



REMARKS ON A DENTATE VARIETY OF CONULUS 

 FULVUS, Drap. 



By William Doherty. 



University of Cincinnati, U.S.A. 



The eastern part of the Union is the peculiar habitat of 

 gastrodont or internally dentate species of Zonih's, and in a 

 gastrodont variety of Zonitcs (Conulus) fiilvus, Drap., recently 

 found at several points near Cincinnati, we have an example of a 

 widely distributed species^ spread over all the northern parts of 

 Europe, Asia, and America, assimilating in one portion of its range 

 to the forms prevalent there. 



The "teeth" are placed as in Z. midtidcntatiis Binn., and 

 vary from one slight, shapeless roughening of the inner surface of 

 the outer whorl, to four large, elongate teeth, radiating from the 

 umbilicus like the spokes of a chariot-wheel. As is usual with 

 gastrodont snails, these teeth attain their greatest development in 

 the half-grown shell. From the chief locality of this variety I 

 obtained 39 young////?'/, of which 18, or nearly half, were more or 

 less dentate, while of 17 adult fiilvi ixoxw the same place, one had 

 in the next to the last whorl a single tooth much flattened and 

 eroded, while all the others where toothless. Hence I suppose 

 that the teeth are graduallv worn awav bv the motions of the 



