44 



ceding fpecies though perhaps not ftriclly belonging to 

 the Mya genus, cannot be placed with more advantage in 

 any other of the Linncean genera. Do6ior Pulteney 

 informs us, that had Do61or Solander lived to finifh his 

 fyftematic defcription of the Portland Cabinet, it was his 

 intention to have conftituted a new genus, in which the 

 Mya pubefcens and prcctenuis together with the Solai 

 buUatus and other fnelis in that Cabinet, were to have 

 been included. 



Had fuch a new genus been formed, tliis fpecies would 

 doubtlefs have been placed in it; but we did not think 

 ourfelves warranted to make fuch an addition in a work 

 profefTedly local, for the fake of one or t\vo fpecies. 



12. 

 BiDENTATA. M. With a fub-oval, thin, comprcfTed, dirty-white fhell, 



deftitute of flrire or markings of any kind, but not gloffy : 

 mod times covered with extraneous matter that gives it 

 a roughifh appearance: umbo fmall, placed near to one 

 end, a little reclined. 



Infide fmooth without any tongue or cicatrix : hinge 

 v,'ith two broad ereft laminated teeth in one valve, none 

 in the other; thefe are placed each flanding obliquely 

 outwards from the beak, and not very clofe together; and 

 between them immediately under the beak is a flight ca- 

 vity for the conne6ling cartilage. 



Length one eighth of an inch, rath.cr more in breadth. 



