A CATALOGUE OF THE BRITISH MARINE ALG^ 5 



L. MenegUniana Gom. S. Scotland (Caroline Park, near Edin- 

 burgh ; Cumbrae). 



Subgenus EULYNGBYA Gom. 



L. (zstuarii Liebm. f. Jen-uf/inea Gom. ( L. ferruginea Ag. et 

 L. luteofusca Holmes in Grevillea, 1882, non Kiitz.). Coasts of 

 Dorset (Swanage, Poole), Sussex (Worthing), and Northumberland 

 (Berwick) ; Scotland (Appin, Cumbrae, Aberdeen, Earlsferry, Fife- 

 shire). Not uncommon. f. limicola Gom. Coast of Wales (Point 

 of Ayr, Flintshire). - - f. natans Gom. Point of Ayr, Flintshire. - 

 f. symplocoidea Gorn. Point of Ayr, Flintshire. - -f. aruyinea Gom. 

 Point of Ayr, Flintshire, f. spectabilis Gom. (= L. spectaMlisThwr.). 

 Point of Ayr, Flintshire. 



L. majuscula Harv. Coasts of Devon (Torquay, Sidmouth, 

 Ilfracombe, Plymouth), Cornwall (Mounts Bay, Mount Edgcunibe), 

 Dorset (Weymouth), and Northumberland (Holy Island) ; Scotland 

 (Hunterston, Girvan, Orkney Islands) ; Ireland (Belfast, Bantry, 

 Portrush) ; Channel Islands (Jersey, Guernsey, Alderney). Not 

 uncommon. f. crispa Holm. & Batt. With the type. 



L. semiplena J. Ag. (= L. confervoides Batt. in Grevillea, non 

 Ag.). Coasts of Norfolk (Yarmouth), Essex (Southend), and Dorset 

 (Weymouth, Swanage) ; N. Wales (Point of Ayr) ; Channel Islands 

 (Guernsey). Not uncommon. 



L. lutea Gom. Coast of Wales (Puffin Island) ; Scotland (Cum- 

 brae). Kare. 



L. Rivulariarum Gom. (within the sheaths of Microcoleus clithono- 

 plastes). Dorset coast (Swanage, Studland) ; Scotland (Cumbrae). 

 Pvare. 



Gen. 17. SYMPLOCA Kiitz. 



S. hydnoides Kiitz. a genuina Gom. ( CalothrixsemiplmalLaxv. 

 et S. Harueyi LeJol.). Coasts of Devon (Sidmouth, Torquay), Corn- 

 wall (Mousehole, Fowey), Dorset (Weymouth, Swanage), and 

 Suffolk (Felixstowe) ; N. Wales (Puffin Island) ; Scotland (Dimbar, 

 Earlsferry, Kingcraig, Arran) ; Ireland (Kilkee); Channel Islands 

 (Guernsey). f. fasciculata Gom. (= S. fasciculata Kiitz.). Dorset 

 coast (Weymouth) ; Northumberland (Berwick) ; Scotland (Cum- 

 brae). Not uncommon. 



S. atlantica Gom. Coast of Wales (Ferryside, Carmarthen) ; 

 Dorset (Studland). Bare. - - ft purpurea Batt. Devon (Mouth of 

 the Yealm). 



Gen. 18. PLECTONEMA Thur. 



P. Nostocorum Born, (within the sheaths of Rivularia bullata, 

 Schiwihrix vaginata, and Dichothrix gypsophila). Coasts of Devon- 

 shire (Torquay, Sidmouth) and Dorset (Weymouth, Chapman's 

 Pool); Scotland (Cumbrae). Ptare. 



P. terebruns Born. & Flah. (within the chalky shells of several 

 species of molluscs). Coasts of Dorset (Weymouth, Swanage), 

 Devonshire (Plymouth, mouth of the Yealm), and Northumberland 

 (Berwick) ; Scotland (Cumbrae) ; Ireland (Belfast Lough). Not 

 uncommon. 



P. Battersii Goni. Northumberland coast (Berwick). Probably 

 not uncommon. 



