^ 66 



markings, but alfo the tranfverfe/?/-/^ ; and the longitudinal 

 Jfr/ce become more obfolete ; and fometimes ihefe fliells are 

 found to be a httle inequilateral : the older Ihells only are 

 pilous. Under all thefe circumllances we cannot help con- 

 fidering that the Linn^an pilofmnd gfycymeiis are mere 

 trifling varieties of the fame fpecies. 



Chemnitz and Gmelin have alfo referred to Lister's 

 figure. Tab. 247, for the glycymeris ; and the figures of 

 Area undata, and marmorata of Chemnitz, Vol. 7, Tab. 57, 

 fig. 560 and 563 might as well have been referred to as 

 varieties. If we may judge from fpecimens in our cabinet 

 which were taken on the fhores of England, they are 

 a<5lually of the fame fpecies, for if they had been figured to 

 reprefent the fhells in queftion they could not better define 

 them ; and ours are evidently the common Area found on 

 our weftern fliores in particular, and in Gutmfey, and are 

 moft certainly the young o^ piloja. 



Area Rosti-ata, Gtnel. Syst. p. 3308 — Turf. Lin. iv, p. 251. Rostra ta. 

 ^ Chem. Conch, vii. t. 55. f. 550, 551. Tab 27. f. 7. 



Shell fub-ovate, the fmallerend produced into a lip, which 

 is refledled, or arcuated ; the oppofite end rounded : umbo 

 fmall, nearly central, and a trifle reclined, the beaks ap- 

 proximate : the whole fhell is of a pale fub-pellucid horn- 

 colour, gloITy, and wrought with very fine, regular, tranf- 

 vQYieJfria, as if cut with an engraving tool, and which under 



a 



