94 A CATALOGUE OF THE BRITISH MARINE 



Gen. 233. SCHIZYMENIA J. Ag. 



S. Dubyi J. Ag. (= KaUymenia Dubyi Harv.). Coasts of Corn- 

 wall (Scilly Islands, Mount's Bay, Cape Cornwall. Falniouth) ; 

 Devon (Plymouth). Ireland (Belfast Lough and Glenarin, Co. An- 

 trim). Channel Islands (Guernsey). Very local. 



Gen. 234. PLATOMA Schm. 



P. marginifera J. Ag. (= Nemastoma marginifera J. Ag.). Coast 

 of Cornwall (Whitsand Bay, Padstow). Very rare. 



Tribe HALARACHNIE-E Schm. 

 Gen. 235. HALARACHNION Schm. 



H. ligulatum Kiitz. (= Halymenia ligulata Ag. a genuinum Hauck). 

 Coasts of Cornwall (St. Minver, Mount's Bay, Falmouth, Torpoint); 

 Devon (Ilfracombe, Plymouth, Torquay, Sidmouth); Dorset (Wey- 

 mouth, Swauage); Hants (Christchurch, Isle of Wight); Sussex 

 (Worthing, Brighton); Suffolk (Gorton); Norfolk (Yarmouth, 

 Sheringham); Cheshire (Hilbre Island); Isle of Man. Wales 

 (Anglesea). Scotland: Aberdeen (Peterhead) ; Banff (Macduff) ; 

 Orkney (Kirk wall) ; Argyle (Southend, Kintyre) ; Bute (Arran and 

 Cumbrae) ; Ayr (Portincross). Ireland : Cork (Ban try) ; Clare 

 (Malbay, Kilkee, and south and east coasts). Channel Islands 

 (Jersey, Guernsey). Rare, and mostly confined to the southern 

 shores of England and Ireland. Var. fi dicliotomum, Harv. Pad- 

 stow, Yarmouth, Jersey. Not uncommon. Var. y latifoliumH&YV. 

 Salcornbe, Plymouth, Kirkwall, West of Ireland. Rare. Var. 

 ^ ramantaceum Harv. Sidmouth, Brighton. Var. e aciculare Hauck. 

 Sidmouth, Weymouth, Worthing, Jersey, Kirkwall. Rare. 



Gen. 236. FURCELLARIA. 



F. fastiyiata Lamour. Common almost everywhere on the 

 shores of the British Islands. 



Tribe NEMASTOME^: Schm. 

 Gen. 237. NEMASTOMA J. Ag. 



N. Bardii Farlow (= Helminthocladia Hiidsoni Batt. in Journ. 

 Bot. 1900, p. 377, non J. Ag.). Coast of Northumberland (Culler- 

 coats). Very rare. 



Fam. RHIZOPHYLLIDACE^E Schm. 



Gen. 238. POLYIDES Ag. 

 P. rotundas Grev. Common on most parts of the British coasts. 



Fam. SQUAMARIACE.E Schm. 

 Tribe CBUORIE^: Schm. 

 Gen. 239. RHODODISCUS. 



R. pulclierrimus Crn. Coast of Devon (Plymouth). Very rare ; 

 only obtained by dredging. 



