118 



V. with an orbicular, thin, white (hell, wi'h fine, con- 

 centric, irregular Itriae, which fometimes run into uneven 

 wrinkles : young (hells a little glolTy : umbo prominent ; 

 apex pointed, and turning a little to one fide, without any 

 cordiforra depreffion: hinge ftrong in proportion to the 

 fubftance of thefhell: in one valve three teeth; in the 

 other two. Infide fiiiooth, glofTy, moderately concave; 

 margin finooth ; edge acute, and fomewhat undated, by a 

 fmall projeftion of the lip oppofite the hinge, from which- 

 runs a broad cicatrix into the middle ot the fiiell. 



This fpecies, defcribed hitherto only by Mr. Pennant 

 has been confounded with the TelUna rotundata, but may 

 readily be diftinguiOied by the hinge, and paiticularly the 

 cicatrix in the infide, that fliell being wholly dellitute of 

 fuch a mark: the umbo is alfo turned more to one fide. 

 We have mentioned before, that Doftor Pulteney has 

 defcribed the Tellina rotundata for this fl:iell, as is evi- 

 dent by his calling it Tellina undata, and quoting tlie 

 Venus undata of Pennant : indeed he is not fingular in 

 this refpeft, for we have feen it in more cabinets than one 

 placed as fuch. This fhell does not appear to be a plen- 

 tiful fpecies, but we have found it at Falmouth, and on 

 the coaft of South Devon, as well as in Biddeford bay : 

 but no where fo fine as on the fliores of Caermarthevjldre 

 near Laugharne. 



Diameter from the hinge to the oppofite margin, an inch 

 and a quarter; hreadthnearaquarter of an inch more. 



ycun«- 



