132 CONCHYLIA— JO/T/fF/?^. 33. 



Tab. nost 11, fig. 1,2. 

 Venus sulcata. Montagu, Test. Brit. p. 131. 



Linn. Trans, viii. p. 81, tab. 2, fig. 2. 



Tui'ton, British Fauna, p. 159. 



Pennant, Brit. Zool. iv. p. 203. 



Dillwyn, Descript. Catal. p. 166, 



lurton, Conch. Diet. p. 235. 

 Venus Danmonia. Montagu, Suppl. p. 45, tab. 29, fig. 4. 



Pennant, Brit. Zool. iv. p. 212. 



Dillwyn, Descript, Catal. 167. 

 Pectunculus truncatus. Da Costa, Brit. Concb. p. 195. 

 Mus. nost. Devonshire, and Irish coasts. 



Shell in size shape and markings exactly resembling the 

 Crassina Scotica, except that the inner margin is edged with fine 

 teeth, giving an obtuse outline to the circumference. 



Among tlie polar shells presented to us by Mrs. Griffiths, and 

 collected by her son, an officer in Captain Parry's late n^st inte- 

 resting voyage of discovery, we have two species much corre- 

 sponding with our Venus Scotica and Venus sulcata. The teeth 

 are similar, and one has the margin plain, the other notched : but 

 the striae are finer and more numerous, somewhat laminar and not 

 so regular; the beaks not so much produced, and generally de- 

 corticated : they are covered with a blackish-brown epidermis. 

 They are the Venus borealis of Linne, and Chemnitz, vii. p. 26, 

 tab. 39, fig. 412 to 414. 



