THE 



NATURAL HISTORY 



OF 



BRITISH SHELLS 



PLATE XXXVII. 



ARCA GLYCYMERIS. 



ORBICULAR ARK. 

 GENERIC CHARACTER. 



Bivalve, valves equal. Teeth of the hinge numerous, and inserted 

 between each other. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Orbicular, concave, very finely striated transversely and longitudinally^ 

 and variegated with zigzag marks. Margin crenated. 



Arca Glycymeris : testa suborbiculata gibba, substriata, natibus 

 incurvis, margine crenato. Linn. Sj/st. Nat. 

 p. 1143. No. 181. 

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