Class VI. SHELLS. i 4l 



Lin. Syft. 1253. No. 723. Lift. Angl tab. 11. fig. zo. Conch, flwviatilis. 

 tab. 141. fig. 3%. Faun. Suec. No. 2194. RlVER 



N. with only two fpires. Brittle, dufky, marked 

 with white fpots. 



Not half the fize of a pea. 



Inhabits ftill rivers and Handing waters. 



Tab. lxxxviii. fig. 142; 



Lin. Syft. 1253. No. 725. Lift. Angl. tab. ill. fig. II, 12, 1 3. Littoralh, 

 Conch, tab. 607. fig. 39, &c. Faun. Suec. No. 2195, l43.STR.AKi> 



N. with a thick fhell, with four fpires. Generally 

 of a fine yellow. Varies greatly into other colors, 



Large as a horfe-bean. 



Common at the fea rocks. 



Tab. lxxxvii. fig. 143. 



XXVI. Its animal a Slug. HALIOTIS* 



Shell of the fhape of a human ear, with a 



row of orifices along the furface. 

 The fpire near one end turned in. 



Lin. Syft. 1256. Lift. Conch, tab. 6lt. Lift. Angl. tab. in, Tubercufata 

 & m l6 ' 144.TUBB*- 



CULATED. 



H. with a rough fhell, the infide like mother-of- 

 pearl. 



Inhabits 



