236 lucintd^:. 



rare. Montagu obtained a single valve from dredged 

 sand at Falmouth ; Turton records it from the Land's 

 End and Teignmouth, although the only specimen in 

 his collection appears to be from the first of those locali- 

 ties; and I fortunately obtained in 1839 two valves 

 (right and left, but not a pair) by dredging in muddy 

 sand, at a depth of about 15 fathoms, off St. Mawe ; s 

 Creek near Falmouth, some miles outside the harbour, 

 and where no ballast had ever been deposited. Mytilus 

 Adriaticus occurred on the same ground ; and a living 

 specimen of Tellina balaustina has since been got there 

 by trawling. Another locality is, according to Dr. 

 Leach (on the authority of Dr. Knox), "southern seas 

 of Scotland, between Arran and Bute and the Mull of 

 Cantire •" but the length and height of a specimen said 

 to have come from that quarter are suspicious, "one 

 inch and threequarters." It must have been the com- 

 mon West-Indian shell generally known as the Lucina 

 divaricata of Lamarck and L. quadripartita of D'Or- 

 bigny. Searles Wood has described the present species 

 from the Mammalian and Red Crag. Collard des 

 Cherres states that it has been found alive at Quelem 

 in Brittany; and it unquestionably inhabits all the seas 

 of Southern Europe, as well as the coasts of Madeira 

 and the Canaries. Dr. Gould included it in his list ; 

 but Stimpson considers the Massachusetts shell to be a 

 distinct species, and has called it Lucina strigilla. 



This is the Lucina digitaria of Poli, Cardium discors 

 of Montagu, Lucina undularia of Searles Wood's Cata- 

 logue, and L. commutata of Philippi. 



A valve of a much smaller species, which is fre- 

 quently seen in parcels of West-Indian shells, was sent 

 between forty and fifty years ago by Mr. Dillwyn to 

 Col. Montagu for his opinion. It was marked " foreign," 



