82 A CATALOGUE OF THE BRITISH MARINE ALGE 
Gen. 201. Prerosrpnonta Falk. 
P. complanata Schm. (= Rytiphlea complanata Harv.). Coasts 
of Cornwall (St. Minver, Land’s End, Falmouth, Whitsand Ba Ye 
Devon (Plymouth). Ireland: Cork (Bantry Bay); Clare (Caarush 
Pt., Miltown Malbay). Very rare. 
(Plymouth, Torbay); Hants (Isle of Wight); Yorks. (Filey) ; 
Durham (Seaham, Roker) ; Northumberland (Whitley, Alnmouth, 
);. Ayr (Largs, Ardrossan, 
Portineross, Saltcoats); Wigtown (Loch Ryan). Ireland: Wicklow 
(Black Castle); Cork (Bantry); Clare (Kilkee), Rather rare.— 
Var. f coralioides (Kiitz.). Berwick. — Var. y repens J. Ag. Ply- 
P. thuyoides Schm. (= Rytiphlea thuyoides Harv.). Coasts of 
Cornwall (Padstow, St. Minver, Trevone, Mount’s Bay, Falmouth); 
Gen. 202. BronentarTenna Bory. 
B. byssoides Bory (= Polysiphonia byssoides Grev.). Coasts of 
Cornwall, Devon, Dorset, Hants, Sussex, Kent, Essex (Walton 
bay). Channel Islands. Common on the 
Tribe Dasyex Schm. 
Gen. 203. Dasya Ag. 
oasts of Dorset 
D, corymbifera Crn Harv.). © 
lands (Jersey, Guernsey). 
- (= D. venusta 
Weymouth, Studland) and the Channel Is 
ery rare. 
D, arbuscula Ag. Coasts of Cornwall (Scilly Islands, Land’s 
End, Lizard, Falmouth, Padstow, Trevone) ; Denn (Plymouth, 
Salcombe, Teignmouth); Dorset (Weymouth) ; Hants (Isle of 
