A CATALOGUE OF THE BRITISH MARINE ALG 87 
(Roundstone). Very ra 
C. Dudresnayi Orn, (= C. affine et C. purpurascens Harv.). 
Devon (Plymouth); Northumberland (Berwick); Bute (Isles of 
Bute and Cumbrae) ; Edinburgh (Joppa). re? 
C. Hookeri Ag. (incl. C. lanosum et C. spinosum Harv.). Coasts 
Scotland: Haddington (Dunbar, North Berwick) ; Edinburgh 
(Joppa); Fife (Elie, Earlsferry); Forfar (Arbroath) ; Kincardine 
(Stonehaven) ; Orkney (Skaill) ; Argyle (Loch Etive); Bute (Arran, 
Cumbrae). Ireland: Cork (Youghal); Wicklow ; Dublin (Killiney, 
Clontarf, Malahide); Belfast Lough ; Clare (Kilkee). Channel 
Islands. Frequent. 
C. Brodiai Harv. Coasts of Cornwall (Mount’s Bay, Penzance, 
f 
(Peterhead, Aberdeen) ; Elgin (Forres) ; Bute (Arran, Cumbrae) ; 
Ayr (Saltcoats). West coast of Ireland (Kilkee, Miltown Malbay). 
are. 
C. fruticulosum J. Ag. Coast of Dorset (Swanage). Very rare. 
C. arbuscula Lyngb. Coasts of Hants (Shanklin) ; Yorks. 
(Filey); Durham (Seaham) ; Northumberlaud (Cullercoats, Whit- 
ley, Newbiggen, Alnmouth, Berwick); Isle o Man. Scotland: 
( 
rae), W. Ireland: Mayo (Ballycastle); Clare (Kilkee) ; Kerry 
(Dingle); Cork (Bantry). Channel Islands. Common on the 
shores of northern England and Scotland, and the west of Ire- 
land. 
C. tetragonum Ag. a genuinum — oo. eon Ss (St. 
illy I Mount’s Bay, Falmouth, Looe); Devon 
Sachse. Pigcivatae Exmouth) ; Dorset (Portland, 
- Hants (Isle of Wight) ; Yorks. (Scar- 
eo Slr bes Wal Scotland: Aberdeen 
Roundstone). Channel Islands. Not uncommon. 
