147 



I 



riDS, and only a little echinated about the fides. Immedi- 

 ately beneath the long ear of the fuperior valve, (which is 

 not fo broad as the correfponding one of the other valve) 

 are a few teeth-like laminae ; at this part the fhell is inca- 

 pable of clofing. Infide partakes of the colour of the 

 exterior, but lighter. Length two inches and a quarter ; 

 breadth two inches. 



This is a common fpecies, frequently dredged up with 

 oyfters on various parts of the coaft. 



Peften lineatus. Da Cofta. p. 147. t. 10. f. 8. Lixeatus. 



Oftrea lineata. Pult. Cat. Dorfet. p. 36. 



Don. Br. Shelh. iv. t. 116. 



P. with a fub-orbicular fliell, with eighteen narrow ribs ; 

 colour white, except the ridge of each rib, which is red 

 on the upper valve : the lower valve is quite white ; the, 

 interftices finely ftriated tranfverfely ; auricles nearly 

 alike. Infide white. In fiiape this elegant fpecies very 

 much refembles the P. opercularis, one valve being a lit- 

 tle more convex than the other; but the fides of this do 

 not rife quite fo high towards the ears, and the ribs are 

 much finer ; which, with the invariable red line upon the 

 ridge of each, without any other markings, at once dif- 

 tinguifhes it. 



Doftor Pdlteney firft noticed this fliell on the Z)<9r- 

 fefjliire coaft, and fent it to Da Costa, who defcribed it in 

 his v/ork. In the Mufeiim Portlandicum was called by 

 Doclor SoLANDER, PeHcti carinatus. 



V 2 We 



