Class VI. 



MYA. GAPER. 



161 



shaped, in each valve ; length one inch, breadth 

 two inches. Tab. 1. Jig. 1. 



On the western coast, from Poole to Fal- 

 mouth. 



Lin. Tr. viii. 37. 



Mont. Test. Br. 42. t. l.f. 1. 5. distorta. 



* M. with a shell somewhat ovate; valves dis- 

 torted, convex, hinge tooth strong; shell white, 

 brittle, nearly transparent; length three quar- 

 ters of an inch, breadth one inch. 



Found by Mr. Montagu in limestone near 

 Plymouth. 



Lin. Tr. viii. 37- 



* M. with a shell nearly oval, rounded at each 

 end ; length one inch, breadth one inch and 

 three quarters. 



Found in the river Kennet, near Newbury, 

 Berkshire. 



6. BATAVA. 



M. arenaria. Lin. Syst. 1112. 

 Gm. Lin. 3218. Faun. Suec 



Lin. Tr. viii. 35. 

 Mont. Test. Br. 30. 



7. ARENA- 

 RIA. 



No. 2127. 





sand. 



M. with a tooth like that of the My a decl'wis ; 

 mouth large ; rough at the base ; the whole 

 shell of an ovated figure, and much narrower at 



VOL. IV. M 



