256 TREGELLES : MARINE MOLLUSCA OF CORNWALL. 
T. donacina L.—-Falmouth (W.H.) ; Mount’s Bay(G.F.T.) ; 
Porthcurnow (R.N.D.); Hayle (Miss H.); Scilly (Miss T.). 
T. pusilla Phil.— Whitsand Bay E., Fowey, Falmouth, 
Helford, Mount’s Bay, Porthcurnow, Land’s End, Hayle, 
Scilly. 
Gastrana fragilis L.—-Falmouth (Miss Carne). 
Scrobicularia piperata Gmel. — Looe, Par, Falmouth, 
Helford, Mount’s Bay, Hayle, St. Minver, Scilly. . 
Syndosmya (vel Abra) prismatica Mont. —Whitsand 
Bay E., Falmouth, Mount’s Bay, Hayle, Scilly. 
S. nitida Miull.—Falmouth, Mount’s Bay, Hayle, Scilly. 
S. alba Wood.—-Whitsand Bay E., Falmouth, Helford, 
Mount’s Bay, Hayle, Harlyn Bay, Scilly. 
S. tenuis Mont.—Mount’s Bay, (Miss T.); Hayle (W.H.). 
Donax vittatus DaC.—Par (J.C.); Falmouth (W.P.C.) ; 
Mount’s Bay (R.N.D.); Hayle (G.F.T.); Padstow and 
St. Minver (R.V.T.). 
Var. nitida Jeff.—Hayle (Miss H.). 
D. (Capsella) politus PoliWhitsand Bay E., Looe, Par, 
Falmouth. Mount’s Bay, Helford, Porthcurnow, Hayle, 
Scilly. 
Ervilia castanea Mont. [Amphidesmac.|.—Whitsand Bay E., 
St. Austell Bay, Falmouth, Mount’s Bay, Porthcurnow 
(especially plentiful), Land’s End, Hayle, Scilly. Two 
perfect adult specimens at Scilly (C.B.). 
Mactra solida L.—Generally distributed. 
Var. intermedia Jeff.—Scilly (R.W.J.S.). 
Var. truncata Mont.—Plymouth Sound, Falmouth, Helford, 
Mount’s Bay, Hayle, Scilly. 
Var. elliptica Bro.—Plymouth Sound, Falmouth, Mount’s 
Bay, Porthcurnow, Land’s End, Scilly. 
M. subtruncata DaC.—Plymouth Sound, Par, Falmouth, 
Helford, Mount’s Bay, Hayle, Padstow, St. Minver, Scilly. 
Var. striata Bro.—Helford (W.R.). 
J.C., viii., Oct. 1806 
