PLATE CXLII. 



MYA GLYCYMERIS. 



LARGE MYA. 



GENERIC CHARACTER. 



Animal Ascidia. Shell bivalve, gaping in general at one extremity : 

 hinge with a thick patulous tooth ; seldom more than one, and that 

 not inserted into the opposite valve. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell gaping at both ends : very thick, lamellous oblong-oval, with 

 transverse rugose striae : first tooth of the hinge very thick. 



Mya Glycymeris : testa utrinque hiante crassissima lamellata ob- 

 longo ovata transverse striato rugosa, cardinis 

 dente primario crassissimo. Gmel. Sj/st. Nat. 

 p. 3222. sp. 17. 



Mya Glycymeris : testa sub-ovata oblonga, ponderosa, ventricosa, 

 utrinque hians, antice et postice quasi oblique 

 truncata, dente cardinali crassissimo. Chemn. 

 T. 6. p. 33. 



Telline beante, Favart D'lhrbigny. Diet. T. 3. p. 358. 



List. n. Conch. 6. t. 3./. 25. Bom. t. 1./. 8, 

 H -b 



