86 A CATALOGUE OF THE BRITISH MARINE ALG 
R. membranaceum Magn. Coasts of Devon (Plymouth, Sidmouth) ; 
Sussex (Brighton); Northumberland (Cullercoats, Berwick) ; Cheshire 
(Hilbre Island); Isle of Man; Anglesea. Scotland: Berwicks. (Burn- 
mouth); Edinburgh (Joppa); Orkney. Ireland: Waterford (Dun- 
garvan Bay). Not uncommon. — Var. 6 macroclada Rosenv. 
Plymouth, Berwick. Rare. 
Ri. minutum Rke. Dorset (Weymouth). Very rare. 
R. Seiriolanum Hary. Gibs. Coast of Anglesea (Puffin Island). 
Very rare. 
fi. pallens Hauck. Coast of Devon (Seaton). Very rare. 
R. Rothii Nag. (= Callithamnion Rothit Lyngb.). Common on 
most of the rocky parts of the British coasts. 
. parasiticum Batt. (= R. sparsum Kjellm.). Coasts of North- 
umberlend (Berwick) ; Berwicks. (Burnmouth); Haddington (Dun- 
bar); Fife (Elie); Forfar (Arbroath); Argyle (Loch Etive); Bute 
umbrae), Not uncommon. 
R, floridulum Nag. (= Callithamnion floridulum Ag.). Coasts of 
Cornwall, Devon, Dorset, Hants, Kent, Essex (Dovercourt), Yorks., 
Durham, Northumberland, Cheshire (Hilbre Island), Isle of Man, 
Anglesea. Scotland: Haddington, Kdinburgh, Fife, Forfar, Kin- 
cardine, Aberdeen, Orkney, Argyle, Bute. Ireland: Antrim, Gal- 
way, Clare, Kerry. Channel Islands. Not uncommon. 
Gen. 215. Cattrraamnion Lyngb. 
C. tenuissimum Kitz. Coasts of Cornwall (Trevone, the Lizard, 
Falmouth); Devon (Plymouth); Dorset (Studland); Orkney (Kirk- 
wall) ; Channel Islands (Jersey). Rare. 
mmon. 
C. Rabenhorstii Orn. Dorset (Studland). Rare. 
C. polyspermum Ag. (incl. C. Grevillei Harv. et C. scopulorum 
Traill). Coasts of Cornwall, Devon, Dorset, Hants, Sussex, Kent, 
Essex, Norfolk, Yorks., Durham, Northumberland, Cheshire (Hilbre 
Island), Isle of Man, Anglesea, Carnarvon. Scotland: Berwicks., 
Haddington, Edinburgh, Fife, Forfar, Kincardine, Aberdeen, Elgin, 
Orkney, Argyle, Bute, Ayr. Ireland: Cork, Wicklow, Dublin, Down, 
Antrim, Donegal, Galway, Clare, Kerry. Channel Islands. Common. 
C. roseum Harv. Cornwall (Scilly Islands, Mount’s Bay, Fal- 
mouth, Looe); Devon (Plymouth, Torquay); Dorset (Weymouth, 
Swanage) ; Hants (Isle of Wight) ; Sussex (Brighton); Kent 
(Folkestone); Essex coumendys Norfolk (Yarmouth, Cley); Yorks. . 
(Scarborough) ; Durham (Roker) ; Northumberland (Berwick) ; 
Cheshire (Hilbre Island). Wales (Anglesea, Carnarvon). Scot- 
land: Berwicks. (Burnmouth); Haddington (Dunbar) ; Edinburgh 
(Joppa); Fife (Earlsferry); Kincardine (Girdleness); Aberdeen 
(Peterhead) ; Orkney (Kirkwall); Bute (Isles of Bute, Arran, and 
