PLATE ex. 



tooth in each valve ; on the contrary Solen Siliqua has two teeth in 

 one valve, and one in the other; the single one being insetted be- 

 tween the two others when the shell is shut. 



This is very scarce. Pennant says it inhabits Red Wharf, Anglesea, 

 •^This is not Soien Vagina of Linnaeus, as Pennant describes it. 



