A CATALOGUE OF THE BRITISH MARINE ALG.E 81 



P. simuhms Harv. Coasts of Cornwall (Mount's Bay, Falniouth, 

 Mount Edgcunibe) ; Devon (Plymouth, Torbay) ; Dorset (Swanage, 

 Studland). Scotland: Orkney (Skaill) ; Bute (Arran, Cuinbrae). 

 Ireland (Valentia, Kerry). Channel Islands. Bare. 



P. opaca Zan. Coast of Guernsey (Petit Port). 



P. niyra Batt. ( Conferva nigra Huds. Fl. Angl. p. 481, e spec, 

 auth. in Herb. Brit. Mus. ; P. atro-rubescens Grev.). Coasts of 

 Cornwall, Devon, Dorset, Hants, Sussex, Kent, Essex, Norfolk, 

 Yorks., Northumberland. Scotland: Berwicks., Haddington, Edin- 

 burgh, Fife, Forfar, Kincardine, Aberdeen, Elgin, Orkney, Bute. 

 Ireland : Generally distributed. Channel Islands. Not uncommon. 

 Var. ft Agardhiana (Grev.). Not uncommon. 



P. obscura J. Ag. Coasts of Cornwall (Pridniouth, Penzance, 

 .Mount Edgcumbe), Devon (Ladran Bay, Sidmouth) ; Dorset (Wey- 

 mouth). Channel Islands (Jersey, Guernsey). Very rare. 



P. nigrescens Grev. var. a pectinata J. Ag. et var. ft fitcoides J. Ag. 

 Common almost everywhere on the shores of the British Islands. 

 Var. y senticosa J. Ag. Coast of Devon. Bather rare. Var. 

 protensa J. Ag. (= P. violacea Harv. in Hook, Br. Fl. ii. p. 332, non 

 Grev.; P. purpurascens Harv. Man. ed. 1, p. 88 ; P. atro-purpurea 

 Moore in Harv. Man. ed. 1, p. 89). Coasts of Devon (Torquay) ; 

 Sussex (Bognor, Eastbourne) ; Argyle (Appin) ; Dublin (Balbriggau) ; 

 and Belfast Lough. Not uncommon. - Var. e afflnis J. Ag. ( = 

 P. a finis Moore). Coasts of Cornwall (Cawsaud Bay) ; Devon 

 (Torbay); Sussex (Eastbourne) ; Kent (Kamsgate) ; Essex (mouth 

 of the R. Deben). Ireland (Carnlough, near Glenarm, and Cushen- 

 dall, Co. Antrim). Channel Islands. Rather rare. 



P. Brodiai Grev. a typica Holm. & Batt. Coasts of Cornwall 

 (Penzance, Falniouth, Torpoint) ; Devon (Plymouth, Torbay, Sid- 

 mouth) ; Dorset (Weymouth, Swanage) ; Hants (Isle of Wight) ; 

 Sussex (Brighton); Kent (Folkestone); Northumberland (Whitley, 

 Alnmouth, Berwick) ; Isle of Man. Scotland : Haddington (Dun- 

 bar) ; Fife (Elie, Earlsferry) ; Forfar (Arbroath) ; Aberdeen (Peter- 

 head); Elgin (Forres); Orkney; Bute (Arran, Cumbrae, and Bute) ; 

 Ayr (Portincross). South and west coasts of Ireland (Roundstone, 

 Malbay, Bantry). Channel Islands. Var. ft dcnsa Holm. & Batt. 

 With the type. Not uncommon. 



P. subulifera Harv. Coasts of Devon (Torbay) ; Dorset (Wey- 

 mouth); Bute (Lanilash, Arran) ; Antrim (Belfast, Carrickf ergus) ; 

 Gal way (Roundstone Bay). Channel Islands (Jersey, Guernsey). 

 Very rare. Var. ft Templetoni Harv. Belfast Bay. 



P. fruticulosa Spreng. (= Bytiphlcea fruticnlosa Harv.). Coasts 

 of Cornwall (Trevone, Mount's Bay, Penzauce, Falniouth) ; Devon 

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

 Hants (Isle of Wight) ; Cheshire (Hilbre Island) ; Isles of Man and 

 Anglesea. Scotland: Bute (Isles of Arran and Cumbrae); Ayr 

 (Portincross, Ballantrae). Ireland : Cork (Bantry Bay) ; Antrim 

 (Portrush) ; Galway (Roundstone Bay); Clare (Miltown Malbay). 

 Channel Islands. Common on the shores of the south of England, 

 Ireland, and the Channel Islands ; rare on those of Scotland and 

 northern England. 



JOURNAL OF BOTANY, DEC. 1902. J / 



