TREGELLES ; MARINE MOLLUSCA OF CORNWALL. 211 
Adeorbis subcarinatus Mont. — Whitsand Bay  E. 
(J.M.B.A.); Fowey (Peach); Helford, Penzance and Porth- 
curnow (R.N.D.); Land’s End (W.R.); Scilly (C.B.). 
Triforis perversa L. [Cerithium perversum|.—Falmouth 
(W.P.C.); Helford (R.N.D.); Mount’s Bay (G.F.T.); Porth- 
curnow (R.N.D.); Scilly (R.W.J.S.). 
Var. pallescens Jeff.—Scilly (R.W.J.S.). 
Bittium reticulatum DaC.—Generally distributed. 
Var. lactescens Jeff.—Land’s End (W.H.). 
Cerithiopsis tubercularis Mont. — Falmouth (J.G.J.); 
Mount’s Bay (G.F.T.); Porthcurnow (R.N.D.); Land’s 
End (Truro Mus.); Scilly (R.W.J.S.). . 
Varr. nana Jeff. and albescens Marsh.—Scilly (C.B.). 
Var. scalaris Monteros.—Scilly (J.T.M.). 
C. Barleei Jeff—Plymouth (J.T.M.); Falmouth (W.H.); 
Scilly (C.B.). 
C. Metaxee D. Ch. 
Scilly (R.W.J.S.). 
Var. angustissima Forbes.—Scilly (J.T.M.). 
Var. alba Marsh.-—Scilly, 40 fms. (J.T.M.). 
C. concatenata Conti. [C. pulchella Jeff.|.—- Plymouth 
(J.T.M.); Land’s End (W.H.); Scilly (R.W.J.S.). 
Var. lactea Marsh.-—Scilly (C.B.). 
Turritella communis Riss. [ 7. evebra 1..].—Generally dis- 
tributed, but not plentiful. 
Var. nivea Jeff.— Plymouth (J.M.B.A.); Mount’s Bay 
(G.F.T.); Scilly (R.W.J.S.). 
Var. gracilis Jeff_—Plymouth (J.M.B.A.); Falmouth (C.B.). 
Czecum trachea L.—Falmouth (Montagu); Helford (W.H.); 
Mount’s Bay, dredged (G.F.T.); Whitsand Bay (J.G.J.); 
Scilly (C.B.). 
C. glabrum Mont.—Falmouth (J.G.J.); Helford (W.R.); 
Mount’s Bay (G.F.T.); Hayle (W.H.); Scilly (C.B.). 
Chenopus pes-pelecani L. [Aforrhais pes-pelecant |.—Ply- 
mouth, S. E. Cornwall, Falmouth, Helford, Mount’s Bay, 
Scilly, 
Land’s End and St. Merryn (W.H.); 
