72 



on is, that it is not fo much produced at the umbo, the 

 hinge not fo ftrong, and in not having three teeth in either 

 valve, the efTential character of that fliell : nor has it any 

 cicatrix within. 



We believe Doftor Pulteney has given this for the 

 Venus undata of Pennant under the title of Tellina un- 

 data ; for we have no doubt if the Doctor had been for- 

 tunate enough to have found the Venus undata, he would 

 not have placed it in the Tcllen genus. This lafh author 

 mentions havincj found it at Poole not uncommon. We 

 have picked it up on the (liores of that harbour ; alfo 

 on the coafh of DevovJJiire, and at Falmouth in Cornwall, 

 but rarely live or double valves. 



16. 

 Fi.ExuosA. Venus Gnuofa. Don. Br. Shells, t. 42. f. 2. 



T. with a thin, pellucid, fragile, convex, fub-orbicu- 

 lar, white fliell : from behind the umbo to the lower angle 

 of the margin, a fulcus runs parallel with the cartilage 

 flope, and forms a finus or flexure at the edge. It is 

 finely, but irregularly ftriated concentrically, and is not 

 very glofly: timbo placed central, much produced, and 

 turns to one fide at the apex: hinge with an obfolete 

 tooth ; along the margin, from behind the u7nbo, a groove 

 in which is fixed the connecting cartilage : Infide fmooth, 

 glofly white. Mr, Donovan has given a figure of a 

 variety of this ftiell, as the F<?ma7?^wz^o/rt of Pennant, in 



which 



