CO^CHy L\ A— DITHYRA. 50. 225 



Dorset Catal. p. 3&. 



Turtou, Conch. Diet. p. 149. 

 Pinna carnea. Dillwyn, Descript. Catal. 326. 



Mus. nosf. Sent to us from Dorsetshire. 



Shell about four inches long, and two wide : but whether it 

 be the Pinna baud ignobilis of Chemnitz, tab. 87, fig, 779, or his 

 P. muricata, tab. 9i, fig. 781, it is not worth much enquiry to the 

 British conchologist, as we believe both our own specimen and 

 that of Montagu to be foreign, 



50. A^OMl A— LINNE. 



Testa incequivalvis, irregularis ; vah'd inferiori sub umbonem 

 perforatd, et operculo vel tendine fixA. Cardo edentidus. 

 Zjigamentum internum, sub umbone transversum. 



Shell inequivalve, irregular ; with the under valve perforated 

 near the beak, and fixed by an operculum or tendon. Hinge 

 witliout teeth. Ligament internal, placed transversely under 

 the beak. 



Like the Mussel and the Oyster, the individuals of this tribe 

 have a fixed and stationary locality, from which they are never 



2a 



