CONCHYLIA—DITHYRA. 86. 145 



Shell round heart-shaped, with rather distant longitudinal rib-like 



striae crossing the more distant transverse ridges. 

 Venus subcordata. Montagv, Test Brit. p. 121, tab. 3, fig. 1. 



Pennant, Brit. Zool. iv. p. 204. 



Linn. Trans, viii p. 82. 



Turton, British Fauna, p. 158. 



Dilhvyn, Descript. Catal, p. 166. 



Ttirton, Conch. Diet. p. 237. 

 Found by Montagu, in sand from Falmouth harbour. 



Shell a quarter of an inch in diameter, rather convex, white, 

 nmnins; nearly straight down the cartilage .side, with remote 

 transverse ridges and strong raised longitudinal striae. 



From the Venus caucellata it differs, in the longitudinal ribs 

 passing over and cutting the transverse ones, giving it a regular 

 net-like appearance, the meshes of which are parallelograms or 

 long squares; the anterior side also slopes from the beaks to the 

 point, without forming an angle. 



Venus tesiu ovbiciilu cordatd convexd, granulatim decussatd, gianulata. 



a7ed inciid, iabiis substrialis. ^• 



Shell round heart-shaped convex with granular decussations, 



the anterior slope deeply cut and the lips slightly straite. 

 Venus granulata. Gmelin, Syst. p. 3277. 



Turton, Linn. Syst. p 226. 

 3Iontagu, Test. Brit. p. 122. 

 Donovan, British Shells, iii. lab. 8:3. 

 Penvdvt, Brit. Zool. iv. p. 207. 

 Turton, British Fauna, p. 158. 

 u 



