PLATE LXXXIX. 



MYA OVALIS. 



OVAL GAPER. 



GENERIC CHARACTER. 



Animal ascidia.' Shell bivalve, gaping at one end. The hinge for 

 the most part furnished with a thick, strong, broad tooth, not in- 

 serted in the opposite valve. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell rather an oblong oval, with a large longitudinal crenulated 

 tooth in one valve, and two in the other. 



Mya ovalis : testa oblongo-ovali cardinis dente primario crenulato 



longitudinali : alterius duplicate 

 Mususculus angustior, ex flavo viri descens, validus, umbonibus acutis, 



valvarum cardinibus velut pinnis donatis, sinuosis, 



List. Angl. t. 2./. 30. 

 Long thick horse Muscle. Petiv. Gaz. tab. 93. fig, 9 

 Mya pictorum. Penn. Br. Zool. 43. fig. 17. 



E 2 



