A CATALOGUE OF THE BRITISH MARINE ALG^E 85 



Gen. 210. HALURUS Kiitz. 



H. eqnisetifolins Kiitz. (Gnffithsia equiseti folia Ag.). Coasts of 

 Cornwall, Devon, Dorset, Hants, Sussex, Kent, Suffolk (Felixstowe), 

 Norfolk (Yarmouth), Yorks. (Bridlington, Scarborough), North 

 Wales. S.W. Scotland (Arrau, Ayrheads). West Ireland (Bantry, 

 Malbay, Kilkee). Channel Islands. Not uncommon. Var. /3 

 simplidjilum J. Ag. (= Griffith si a simplicifilum Ag.). Isle of Wight 

 (Freshwater) ; Norfolk (Yarmouth, Cromer) ; Wicklow (Ardinairy 

 Point, Black Castle). Very rare. 



Tribe MONOSPORE.E Schm. 

 Gen. 211. BORNETIA Thur. 



B. secundi flora Thur. (= Griffithsia secundijiora J. Ag.). Coasts 

 of Cornwall (Scilly Islands) ; Devon (Bovisaud, Plymouth, Tor- 

 quay). Channel Islands. Very rare on the English coast ; not 

 uncommon on that of the Channel Islands. 



Gen. 212. MONOSPORA Solier. 



M. pedicellata Sol. ( = Callithamnion pedicellatum Ag.). Coasts 

 of Cornwall (St. Minver, Scilly Islands, Mount's Bay, Falmouth, 

 Fowey) ; Devon (Plymouth, Salcombe, Torquay, Sidmouth) ; Dorset 

 (Weymonth, Swauage, Studland) ; Hants (Isle of Wight) ; Sussex 

 (Brighton) ; Norfolk (Cromer); Cheshire (Hilbre Island); Anglesea; 

 Carnarvon; Pembroke (Milford Haven). Scotland: Orkney; Bute 

 (Arran and Cumbrae) ; Ayr (Saltcoats, Ardrossan). Ireland: Kerry 

 (Valentia, Ferriter's Cove); Cork (Bautry) ; Wicklow; Dublin 

 (Howth) ; Down (Bangor, Portaferry) ; Antrim (Belfast) ; Galway 

 (Eoundstone) ; Clare (Kilkee). Channel Islands. Not uncommon 

 on the south coasts of England and Scotland ; common in Ireland 

 and the Channel Islands. - Var. /3 comosa Holm. & Batt. Fal- 

 mouth, Torquay, Sidmouth, Weymouth, Alderney. Rare. 



M. clavata J. Ag. Devon (Sidmouth) ; Sussex (Brighton). 

 Channel Islands (Alderney). Rare. 



Gen. 218. PLEONOSPORIUM Nag. 



P. Borreri Nag. (= Callithamnion Barren Harv.). Coasts of 

 Somerset (Clevedou, Blue Anchor, Minehead); Cornwall (St. Min- 

 ver, Land's End, Falmouth, Looe) ; Devon (Ilfracornbe, Plymouth, 

 Torquay, Sidmouth) ; Dorset (Weymouth, Swauage, Studland) ; 

 Hants (Isle of Wight); Sussex (Brighton); Suffolk (Felixstowe); 

 Norfolk (Yarmouth) ; Yorks. (near Hull) ; Cheshire (Hilbre Island, 

 New Brighton) ; Isle of Man (Douglas) ; Glamorgan (Swansea). 

 Scotland : Argyle (Falls of Lora) ; Orkney. East coast of Ireland: 

 Dublin (Clontarf, Howth i. Channel Islands (Guernsey). Rare. 

 Var. /3 fasciculatum Holm. & Batt (= Callithamnion fasdculatum 

 Harv.). Devon (Torquay) ; Norfolk (Yarmouth). Very rare. 



Tribe CALLITHAIINIE.E Schni. 

 Gen. 214. RHODOCHORTON Nag. 



R. Brebneri Batt. Parasitic on the fronds of Glceosiphonia capil- 

 laris. Rennie Rocks, Plymouth. Very rare. 



