A CATALOGUE OF THE BRITISH MARINE ALG.E 57 



Yorks. (Scarborough, Filey, Whitby) ; Durham (Sunderland) ; 

 Northumberland (Cullercoats, Alnmouth, Holy Island, Berwick) ; 

 Isle of Man; Cheshire (Hilbre Island). Wales: Anglesea (Hilbre 

 Island). Scotland : Berwicks. (Burnmouth, Eyemouth) ; Had- 

 dingtou (Dunbar, North Berwick) ; Edinburgh (Joppa) ; Fife 

 (Kinghorn, Elie, Earlsferry) ; Forfar (Arbroath) ; Kincardine 

 (Stonehaven) ; Aberdeen (Peterhead) ; Argyle (Firth of Lome, 

 &c.) ; Bute (Isles of Arran, Bute, and Cumbrae) ; Ayr (Ardrossan, 

 Saitcoats) ; Dumbarton (Helensburgh). Ireland : Bautry Bay, 

 Co. Cork ; Dungarvan Bay, Co. Waterford ; Wicklow ; Howth, 

 Balbriggau, &c., Co. Dublin; Strangford and Belfast Loughs, 

 Co. Down; Antrim coast; Rounds tone, Co. Galway ; Kilkee, Co. 

 Clare. Channel Islands (Jersey, Guernsey, Alderney, Sark). 

 Common and abundant everywhere on the rocky parts of the 

 British coast. Var. umbilicalis J. Ag. Coasts of Cornwall (Fal- 

 mouth) ; Devon (Torquay, Sidmouth) ; Dorset (Swanage); Kent 

 (Sheerness) ; Northumberland (Holy Island, Berwick). Scotland: 

 Haddiugtou (Dunbar) ; Forfar (Arbroath) ; Bute (Isles of Cumbrae 

 and Bute) ; Argyle (Loch Goil) ; Ayr (Portiucross, Ardrossan) ; 

 Orkney Islands. Ireland: Ban try Bay, &c. Channel Islands 

 (Jersey). Common and abundant on our rocky shores. 



P. amethystea Kiitz. Coasts of Yorks. (Scarborough) ; Edin- 

 burgh (Joppa); Fife (Earlsferry); Forfar (Arbroath). Coast of 

 Ireland. Very rare. 



Subgenus DIPLODERMA Rosenv. 



P. miniata Ag. a ty/rica Rosenv. Coasts of Northumberland 

 (Berwick); Bute (Isle of Cumbrae); Orkney Islands (Kirkwall). 

 Ireland : Murlough Bay and Cushendall, Co. Antrim. Locally 

 abundant in spring and early summer, but hitherto recorded from 

 only a few localities in Scotland and Northern England and Ire- 

 land. fi amplissima Rosenv. (= Diploderma amplissimum Kjellm.). 

 Coast of Bute (Isle of Cumbrae). Ireland: Clontarf, Co. Dublin. 

 Very rare. y tenuissima Rosenv. (= D. tenuissimum Stromf.). 

 Coast of Bute (Isle of Cumbrae). Very rare. - -^ abyssicola Rosenv. 

 (= Porphyra abyssicola Kjellm.). Coasts of Bute (Isle of Cumbrae) 

 and the Orkney Islands (Kirkwall). Locally abundant. 



Suborder EUFLORIDE.&. 



Series NEMALIONIN^I Schni. 



Fam. HELMINTHOCLADIACE^ Schra. 



Tribe ACROCH^STIE^:. 

 Gen. 152. COLACONEMA Batt., non Schni. 



C. BonnemaisonicB Batt. Coasts of Devon (Plymouth) and 

 Northumberland (Berwick). Very rare, and always parasitic in 

 the fronds of Bonnemaisonia asparagoides. 



C. reticulatum Batt. Coasts of Devon (Plymouth) and Donegal 

 (Moville Bay). Very rare. Parasitic in the fronds of Desmarestia 

 Dresnayi. 



JOURNAL OF BOTANY, OCT. 1902.] i 



