' 230 



Both LiNN^us and Gmelin appear to be perfeclly 

 unacquainted with the natural hiRory of this fliell, having 

 defcribed it to inhabit wet mofs, which befpeaks it to be a 

 land fhell ; whereas, it is an aquatic ; the animal of which 

 is incapable of refiding out of water. The latter author 

 has alfo expreffed his doubts, whether it was not a variety 

 o( B. /ontinalis. How fuch doubts could ever have ex - 

 ifted, even from a comparifon of the two fliells, inde. 

 pendent of their natural hiftory, is very extraordinary: 

 the animals too are eflentially diflferent. 



Animal dulky-black; Tentacula two, moderately long, 

 fetaceous, black ; eyes placed on the head, at the bafe of 

 the feelers : Siijlentaculum not quite fo long as the fhell. 



No fins, or membrane that covers the fhell, like that 

 of the Bulla fontinalis. 



GEN. 



