256 C O N C H O L O G Y 



pendicular gutter or pipe, fixed to the top, 

 and running down to the middle of the 

 tipper valve. 



I {hall now give my definition, and 

 charafterife the genus as much as can be, 

 for I hold it impoffible to be accurately 

 made till we difcover more recent fpecies; 

 for thofe already difcovered recent are few, 

 and even differ in fome particulars ; and 

 the foffil fpecies, which are very numerous, 

 never Ihew their inner ftrudture, and fo 

 extremely feldom the hinge, that as yet 

 we cannot fix any charadlers with ac- 

 curacy. 



I fhall therefore, under thefe circum- 

 ftances, define the Anomias as follows. Bi- 

 valves with unequal valves and never eared, 

 the beak of the largeft or under valve is 

 greatly produced, and rifes or curves over 

 the beak of the fmaller or upper valve, 

 and is perforated or pierced through like 



a tube 



