PLATE LXXXII. 



MYA DECLIVIS. 



SLOPING MYA, OR GAPER, 

 GENERIC CHARACTER. 



Animal an Ascidia. Shell bivalve gaping at one end. The hinge 

 for the most part furnished with a thick, strong, and broad tooth, not 

 inserted into the opposite valve. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell somewhat oval, posterior end obliquely angulated. Tooth 

 «f the hinge thick and scarcely prominent. 



Mya declivis : testa subovali, postice oblique subangulata. Car- 

 dinis dente crasso vix prominente. 



Mya Declivis with a brittle, half transparent shell, with a hinge 

 slightly prominent ; less gaping than the truncata ; 

 near the open end sloping downwards. Ptnn. Br. 

 Zool. Vol. 4. p. 19. sp. 15. 



