144 C O N C H O L O G Y. 



Family 2. Haliotis^-, Au res Marina?, Sea 

 Ears. The definition of this family is 

 as follows : Shells of an ear-like form, 

 flattifli, almoft wide open, or hollow, for, 

 from the apex or head, all along one fide, it 

 has only a broad ledge or margin. The apex 

 has alfo a fingle perfedl whirl, and a curv- 

 ed row of holeSj or perforations, runs itr 

 length, from the head to the oppofite 

 end, 



Thefe Shells, in appearance and nature, 

 approach fo extremely to the Limpets, for 

 they alfo fix themfelves to rocks, that I 

 think they juftly demand the next place or 

 link in the metliod. 



"^ Haliotis. Lifter could have had no doubts about 

 this family being next in order to the Limpets, had he 

 obferved, the natural method, i. e. funplicity of figure. 

 It is true this Shell has a whirl (rather than a fpire) ; 

 but in fome fpecies it fcarcely projeds. One fees, in 

 many of the Nerits, very evident tokens of more 

 circumgyrations. 



However, 



