OF CONCHOLOGY. 85 



which, however, something of this character appears in connec- 

 tion with a pleurotomose aperture somewhat like that of Sckiz- 

 ostoma. 



In all my acquaintance with the shells of this region I have 

 not (though Mr. Binney declares to the contrary) found any 

 specimens of Melaniho that could be confounded with a some- 

 what globular shell from Columbus, Ohio, for which at one time 

 I suggested the name obesa. I would remark that obesa exhibits 

 constant characters and does not vary to any greater extent 

 than I have observed decisa to vary here in the canal ; and that 

 is so little as not necessarily to cause any perplexity. The va- 

 riations of Integra are 'peculiar and excessive in one locality only, 

 under my observation, and that locality is known as the "Wide 

 Water" of the Erie Canal, a short distance east of Mohawk, 

 New York. 



I propose, in a few months, to send to the " Conchological 

 Section" a series of specimens which shall give greater weight 

 to these remarks, with the desire that they may help to elucidate 

 some of the obscurities that seem to invest the subgenus Melantho. 



