117 



or interflices, rather broader and deeper than the rePi; 

 mod commonly of a light colour, but rarely quite white • 

 fome are quite plain, others faintly radiated, or ftreaked all 

 over with rufous-brown ; and not unufual with two or three 

 broad rays only : it is moderately convex : iivibo much 

 turned to one fide, beneath which is a (hort, much de- 

 prefTed, cordiform imprefiTion. Infide fmooth, white; 

 margin plain. Diameter two inches. Younger fhells 

 flope more from the umbo on the anterior fide, and in this 

 ftate it was made a dillinft fpecics in the Mufeum Port- 

 landicum by the name of Venus Linda; which induced 

 our late worthy friend Do6lor Pulteney to do the fame. 



This flope however is rarely found after the fliell ex- 

 ceeds an inch and a quarter in diameter, \vhen it gradually 

 encreafes to rife at that part. The tongue, or cicatrix, 

 which is almofl; an invariable fpecific chara6ler, is alike in 

 both ; it is long, fomewhat taper, and runs into the mid- 

 dle of the fhell more than half way acrofs. 



It is not an uncommon fpecies on many parts of our 

 coafl ; is plentiful in Cornwall, efpecially about Fal- 

 mouth ; and on the fhores of DevonJIiire, but fcarcer in 

 Dorfeljhire; we have alfo found it in abundance on fome 

 parts of the coaft of South Wales. 



1. 

 Venus undata. Br. ZooJ. t. 55. f. b\.—Turt. Lin. iv. p. 233. Undata. 

 Lin. Tram. vi. t. 17. f. 17. IS. (IVcod.) 



V. with 



