PLATE LXXXV. 



MYA ARENARIA. 



SAND GAPER, 



GENERIC CHARACTER. 



Animal an 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 ovated, one end rounded, the other narrow and gaping. 

 Hinge, in one valve a hollow cavity, near which a broad, erect, rounded 

 tooth of the opposite valve is received. 



My A Arenaria : testa ovata posterius rotundata, cardinis dente an- 



trorsum porrecto rotundato denticuloque laterali. 



Lin. Faun. Suec. 2127. — Gmel. Linn. Si/st. p. 



3218. 303. sp. 2. 

 Mya Arenaria. Sand. Penn. Br. Zool. p. 79. T. 42. 16. 

 Chamae media ovata fusca. Arenaria. Da Cojla. Br. Conch, p. 232. 



sp. 56. i 



Mya Arenaria. Bast, opusc. subs. 2. p. 69. t. 7. fig. 1-3. 



