218 TREGELLES: MARINE MOLLUSCA OF CORNWALL. 
ORDER OPISTHOBRANCHIATA. 
SuB-ORDER TZEC7/BRANCHIA TA. 
Actzon tornatilis L.—Whitsand Bay, E. (J.M.B.A.) ; 
Falmouth (W.H.) ; Mount’s Bay, dredged (G.F.T.) ; Hayle 
(W.H.) ; Scilly (R.W.J.S.). 
Tornatina: mammillata Phil. [U¢riculus m.].—Mount’s 
Bay (Penz. List.) ; Land’s End (W.H.) ; Scilly, dead, rare 
(R.W.J.S.). 
T. umbilicata Mont. [CyZichna u.].—Falmouth (Montagu) ; 
Mount’s Bay (G.F.T.) ; Hayle (W.H.); Scilly (R.W.J.S.). 
T. truncatula Brug. [U¢ricudus ¢.|.—Plymouth, Falmouth, 
Helford, Mount’s Bay, Porthcurnow, Land’s End, Scilly. 
T. hyalina Turt.—Falmouth (W.P.C.); Porthcurnow (R.N.D.); 
Land’s End (W.H.); Scilly, “one or two specimens only 
from deep water ” (R.W.J.S.). 
T. expansa Jeff—Menavawr, Scilly, several dead specimens ; 
new to England (C.B.). 
T. obtusa Mont. Mount’s Bay (Penz. List) ; Hayle (W.H.) ; 
Scilly, somewhat rare (R.W.J.S.). 
Var. Lajonkaireana Bast.—Scilly, with the type (R.W.J.S.); 
Hockin mentions a variety, probably this. - 
Volvula acuminata Brug. — Off Plymouth (J.M.B.A); 
Nare Point (Helford ?) (W.H.). 
Scaphander lignarius L.—Plymouth, S.E. Cornwall, Fal- 
mouth, Mount’s Bay, Hayle, Scilly. 
Var. alba Jeff.—Mount’s Bay (G.F.T.) ; Hayle (Miss H.). 
Cylichna cylindracea Penn.—Falmouth (Montagu); Mount’s 
Bay (G.F.T.); Hayle (W.H.) ; Scilly (R.W.J.S.). 
Bulla utriculus Broc.—Falmouth (W.H.); Mount’s Bay (C.B.). 
B. (Haminea) hydatis L.—Plymouth (Turton); Falmouth 
(W.P.C, and others) ; Scilly (R.W.J.S.). 
Acera bullata Mill.—Falmouth and Helford (W.H., R.V.) ; 
Scilly (Lord Vernon, & C.B.). 
Philine aperta I..—Generally distributed. 
J.C., vuii., July 1896, 
