A CATALOGUE OF THE BRITISH MARINE ALG 5 
L. Meneghiniana Gom. §. Scotland (Caroline Park, near Edin- 
burgh; Cumbrae). 
Subgenus Eutynesya Gom. 
shire). Not uncommon.—f. limicola Gom. Coast of Wales (Point 
k 
Portrush); Channel Islands (Jersey, Guernsey, Alderney). Not 
mmon.—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). Rare. 
. Rivulariarum Gom. (within the sheaths of Microcoleus chthono- 
plastes). Dorset coast (Swanage, Studland); Scotland (Cumbrae). 
Rare. 
Gen. 17. Symenoca Kiitz. 
S. hydnoides Kiitz. @ genuina Gom. (= Calothrix semiplena Harv. 
et 8S. Harveyi Le Jol.). Coasts of Devon (Sidmouth, Torquay), Corn- 
wall (Mousehole, Fowey), Dorset (Weymouth, Swanage), and 
Suffolk (Felixstowe) ; N. Wales (Puffin Island); Scotland (Dunbar, 
Rarlsferry, Kingeraig, Arran) ; Ireland (Kilkee); Channel Islands 
(Guernsey). —f. fasciculata Gom. (= 8S. fasciculata Kitz.). Dorset 
coast (Weymouth); Northumberland (Berwick); Scotland (Cum- 
ra ot uncommon, i 
S. atlantica Gom. Ooast of Wales (Ferryside, Carmarthen) ; 
Dorset (Studland). Rare. — 8 purpurea Batt. Devon (Mouth of 
the Yealm). 
Gen. 18. Pxrecronema Thur. ; 
P. Nostocorum Born. (within the sheaths of Rivularia bullata, 
Schizothriz vaginata, and Dichothrix gypsophila). Coasts of Devon- 
shire (Torquay, Sidmouth) and Dorset (Weymouth, Chapman’s 
Pool); Scotland (Cumbrae). Rare. 
P. terebrans Born. & Flah. (within the chalky shells of several 
(Berwick); Scotland (Cumbrae); Ireland (Belfast Lough). Not 
uncommon, : 
P. Battersii Gom. Northumberland coast (Berwick). Probably 
not uncommon. 
