A CATAT.OGUK OF THE BRITISH MARINE ALG7E 97 



Gen. 249. DERMATOLITHON Fosl. 



D. pmtulatnm Fosl. (= Melobesia pustulata Lam. et M. verrucata 

 Lam.). Not uncommon on the coasts of the British Islands. 



D. macrocurpum Fosl. f. Laminar i<z Fosl. (= Melobesia Laminaria 

 Cm.). Coasts of Cornwall, Devon, Dorset, Yorks., Northumber- 

 land, Haddington, Fife, Forfar, Bute, Ayr, Waterford. Not un- 

 common. 



D. hapaUdioides Fosl. (Melobesia hapalidioides Crn. et M. con- 

 Jims Johnst. Irish Nat. 1896?). Coasts of Cornwall (Boscastle) ; 

 Devon (Torbay, Sidinouth) ; Northumberland (Berwick) ; and Ire- 

 land ? Not uncommon. 



D. adplicatiim Fosl. Coast of Sussex (Bognor). 



Gen. 250. LITHOPHYLLUM Fosl. 



L. racemus Fosl. Coast of Devon (Falmouth) and west coast of 

 Ireland. Vars. compressa and emiana Foslie. West coast of Ireland, 



L. dentatum Fosl. f. Macallana Fosl. Coast of Galway (Round- 

 stone Bay). 



L. incrustans Fosl. Common all round the British coasts. 

 Var. Harvey i Fosl. Common. 



L. orUculatum Fosl. South-west coast of Scotland (Kyles of 

 Bute, Arran, Seamill). 



L. Crouani Fosl. Coasts of Northumberland (Berwick) and 

 Bute (Arrau). Probably common. 



Gen. 251. LITHOTHAMNION Fosl. 



L. ylaciale Kjellm. ( L. flabellatum Batt., non Rosenv.). 

 South-west coast of Scotland : Bute (Port Bannatyne). 



L. colliculosum Fosl. and var. rosea Batt. Southern Scotland 

 and Western Ireland. Not uncommon. 



L. Battersii Fosl. Coast of Bute (Cumbrae). 



L. calcareum Aresch. West coasts of England, Scotland, and 

 Ireland. Vars. subsimplex Fosl. and conipressa Fosl. West of Ireland. 



L. Sonderi Hauck. South-west coast of Scotland (Bute, Cum- 

 brae), and east and west of Ireland. 



L. lichenoides Fosl. (= Melobesia lichenoides Harv.). Coasts of 

 Cornwall, Devon, Dorset, Hants, Isle of Man, west coast of Ireland, 

 and Channel Islands. Rather rare. Var. agaridformis Fosl. ( = 

 Melobesia agaridformis Harv.). West coast of Ireland (Roundstone). 



L. Lenormamli Fosl. f. typica Fosl. Not uncommon on the 

 British coasts. Var. sublavis Fosl. Coast of Northumberland 

 (Berwick). 



L. Strdm/eltii Fosl. " Common in Ireland," Johnston & Hens- 

 man. 



L. membranaceum Fosl. Not uncommon on the British coasts. 



L. corticiforme Fosl. (= Melobesia corticiformis Kiitz. et Hapalidium 

 Hildenbrantioides Crn.). Not uncommon. 



Gen. 252. CLATHROMORPHUM Fosl. 



C. drcumscnptuui Fosl. " West of Ireland," Johnston & Hens- 

 man. 



JOURNAL OF BOTANY, DEC. 1902.1 m 



