41 



PANOPtEA. 



MYA GLYCIMERIS.— LinnCBUS. 



Chem.6,t. 1,3,/ 25. 



This genus is nearly allied to the G. Solen. The more 

 prominent apices of these shells, and the situation 

 of the ligament of the valves prevent their being class- 

 ed with the Myae. Shell equivalve, transverse, un- 

 equally gaping at the sides; a conical primary tooth on 

 each valve, at the side of which is a compressed cal- 

 losity, short and ascendant, not projecting externally ; 

 ligament external, on the longest side of the shell, at- 

 tached to the callosities, or nymphae. 

 Ponopaea Aldrovandi 



GLYCIMERIS. 



MYA SILIQUA.— LillimuS. 



Chem. tab. 11, page 192, fig. 1934. 

 The few species of this genus yet known have been 

 blended by previous authors with the Myae, from 

 which their hinge distinguishes them: they are allied 

 to the Solen and Saxicava; from the first of which they 



