OF NORTHUMRERLAND AND DURHAM. 173 
the boats engaged in the brat fishing. It is in Mr. R. Maclau- 
rin’s list of Bivalved Shells, found in Coldingham Bay, where it 
is stated that dead shells are not rare. We are not aware of its 
having been got on other parts of the coast. 
81. ARCA, Linnaeus. 
1. A. carptssa, Lam. 
Arca fusca, Mont. Test. Brit. Supp. 51. 
In cavities of stones and old shells from deep water. Fre- 
quent in the north of Northumberland.—W/r. R. Embleton. Cul- 
lercoats—J. H. F. St. Mary’s Island.—A. ZH. 
82. LEDA, Schumacher. 
1. L. caupata, Don. 
Arca minuta, Mont. Test. Brit. 140. 
From deepish water, frequent. Several living individuals 
were dredged in seventeen fathoms off: Whitburn, by Mr. R. 
Howse. 
The Arca minuta of Fabricius appears to be distinct from this. 
Capt. Brown mentions having found a single valve of “ Vu- 
cula rostrata” at Holy Island. May it not have been a large 
variety of this, which has sometimes the posterior part much 
incurved in old shells ? 
83. NUCULA, Lamarck. 
1. N. nuctzvs, Linn. 
Arca nucleus, Mont. Test. Brit. 141. 
Not uncommon. Mr. R. Howse dredged it in great abundance 
off Whitburn, along with the last. 
2. N. nrtrpa, Sow. 
Nucula nitida, Sow. Conch. Illust. f 20; Thorpe Brit. 
Mar. Conch. 248, f. 31. 
In deepish water, and thrown up in sand, rather rare. Cul- 
lercoats. A rayed variety has been got at Whitburn by the 
Rev. G. C. Abbes. 
3. N. tenuis, Wont. 
Arca tenuis, Mont. Test. Brit. Supp. 56, t. 29, f. 1. 
