88 A CATALOGUE OF THE BRITISH MARINE 



Ayr (Saltcoats). West coast of Ireland and Channel Islands. 

 Frequent. 



C. tetricum Ag. Coasts of Somerset (Minehead) ; Cornwall 

 (Scilly, Mount's Bay, Falmouth, Trevone) ; Devon (Plymouth, 

 Lynmouth, Exmouth, Sidmouth) ; Dorset (Swanage) ; Hants (Isle 

 of Wight); Norfolk (Cromer). Wales (Swansea Bay). Ireland: 

 Cork (Youghal) ; Dublin (Lambay) ; Clare (Malbay). Channel 

 Islands. Common on the south coast of England, the south-east 

 and west of Ireland, and the Channel Islands. 



C. corymbosum Lyngb. (incl. C. versicolor Ag.). Coasts of Corn- 

 wall, Devon, Dorset, Hants, Sussex, Kent, Essex (Harwich), 

 Northumberland (Berwick), Cheshire (Hilbre Island), Isle of Man. 

 Wales (Anglesea). Scotland : Edinburgh (Joppa) ; Fife (Earls- 

 ferry) ; Aberdeen (Peterhead) ; Orkney (Kirkwall) ; Argyle (Loch 

 Etive) ; Bute (Cumbrae) ; Ayr (Ardrossan, Girvan). Ireland : 

 Cork (Bantry) ; Wicklow ; Dublin (Clontarf, Malahide) ; Down 

 (Bangor) ; Belfast Lough; Galway (Roundstone) ; Clare (Kilkee). 

 Channel Islands. Not uncommon. 



C. granulatum Ag. (= Callithamnion spongiosum Harv.). Coasts 

 of Cornwall (Scilly, Land's End, Falmouth, Pridmouth) ; Devon 

 (Ilfracombe, Plymouth, Salcombe, Torbay) ; Dorset (Swanage) ; 

 Hants (Isle of Wight) ; Northumberland (Berwick) ; Isle of Man 

 (Douglas). Wales (Anglesea). Scotland: Haddington (Dunbar) ; 

 Fife (Largs) ; Forfar (Arbroath) ; Orkney; Bute (Arran, Cumbrae) ; 

 Ayr (Saltcoats, West Kilbride). Ireland : Wicklow ; Dublin 

 (Howth, Kingstown Harbour, Killiney) ; Antrim (Larne) ; Clare 

 (Kilkee). Channel Islands. Not uncommon. 



Gen. 216. SEIROSPORA Harv. 



S. Grriffithsiana Harv. (= Callithamnion seirospennum Griff.). 

 Coasts of Cornwall (Trevone, Whitsand Bay, Torpoint) ; Devon 

 (Plymouth, Salcombe, Torbay) ; Dorset (Weymouth, Swanage, 

 Studland) ; Sussex (Brighton) ; Cheshire (Hilbre Island) ; Isle of 

 Man. Scotland: Aberdeen (Peterhead) ; Cromarty ; Orkney (Kirk- 

 wall Bay); Bute (Arran). Ireland: Down (Portaferry) ; Galway 

 (Eoundstone). Rare. - ft miniata Batt. (= C. seirospennum var. 

 miniatum Cru.). Dorset (Weymouth, Studland). 



S. interrupta Schm. (= Callithamnion interruptum Ag.). Coasts 

 of Dorset (Swanage, Studlaud) and Sussex (Brighton). Very rare. 



S. hormocarpa Batt. (= Callithamnion hormocarpum Holrn. ; 

 C. byssoides f. seirosporifera Holm. & Batt.). Coasts of Cornwall 

 (Torpoint); Devon (Bovisand, Plymouth, Wembury); Dorset (Stud- 

 land). Very rare. 



Tribe COMPSOTHAMNIE^E Schm. 

 Gen. 217. COMPSOTHAMNION Schm. 



C. thuyoides Schm. (= Callithamnion thuyoides Ag.). Coasts of 

 Cornwall (St. Minver, Flushing Bay, Falmouth, Land's End, 

 Trebetherick, Fowey) ; Devon (Plymouth, Ilfracombe, Torquay, 

 Sidmouth); Sussex (Brighton) ; Norfolk (Yarmouth, Cromer); Isle 

 of Man. Wales (Swansea). Scotland (Orkney). Ireland (Wick- 

 low, Portaferry, Roundstone). Channel Islands (Guernsey). Bare. 



