NUCULA, LEDA. 13 
fathoms; very common, I have taken this and the last 
species almost everywhere in the Clyde district ; specially 
fine specimens of the present species at Lochgoilhead, a little 
below Douglas Pier, in about 15 or 18 fathoms. Rayed 
specimens are not uncommon. Mr. Norman considered this 
species very rare, although he dredged Cumbrae (where I 
found it abundant) pretty thoroughly. 
British distribution.—Except in the Clyde district this 
species seems much rarer than the preceding one, but is 
dispersed over all our seas from low water (at Swansea) to 
great depths. 
Foreign localities. —Greenland (Mérch), Norway and 
Sweden (Lovén, and others), northern and southern coasts of 
Spain and Portugal (J/‘Andrew), Mediterranean (Jeffreys). 
* Nucula tenuis, Montagu. 
Arca tenuis, Montagu. 
Habitat.—Rather sparingly met with in muddy gravel, 
from 15 fathoms downward, in Rothesay Bay and east side 
of Bute; and outside the Tan Spit, Cumbrae. Locally plen- 
tiful opposite Otter, Loch Fyne; and at Lochgoilhead, about 
half a mile below Douglas Pier, in 18 fathoms, where fine 
specimens are obtained. 
British distribution —Throughout Scotland and north of 
England this species is frequently met with in deepish water. 
Alder reports it as not uncommon in Northumberland; but 
it is not included in Messrs. Leckenby and Marshall’s list 
from the Dogger Bank. It occurs sparingly in the north- 
east of Ireland. 
Foreign localities —Massachusetts (Gould), Gulf of St. 
Lawrence (Whiteaves); Iceland (Verkriizen), Norway and 
Sweden (Sars, and others), Brittany (Cailliaud), Mediter- 
ranean and Aigean (Forbes, and others). It is not included 
in M‘Andrew’s list from Spain and Portugal. The variety 
inflata was obtained by Captain Feilden in Discovery Bay 
81° 41’ N. lat. 
LepA, Schwmacher. 
* Leda py 
oma, Miinster. 
Nucula pygmea, Minster; Nucula tenuis, Philippi (not 
Montagu); Nucula gibbosa, Smith. 
Habitat—I have only taken single valves of this species 
in Rothesay Bay, and in deep water outside Cumbrae. These 
valves are quite possibly remains of the glacial period. I 
