88 A CATALOGUE OF THE BRITISH MARINE ALG 
Ayr (Saltcoats). West coast of Ireland and Channel Islands. 
Frequent. 
C. tetricum Ag. Coasts of Somerset (Minehead); Cornwall 
(Scilly, Mount’s Bay, Falmouth, Trevone); Devon (Plymouth, 
Lynmouth, Exmouth, Sidmouth) ; i Dorset (Swanage) ; Hants (Isle 
of Wight); Norfolk (Cromer). Wales (Swansea Bay). Ireland: 
Cork (Youghal); Dublin (Lambay); Clare (Malbay Channel 
Islands. Common on the south coast of England, the south-east 
and west of Ireland, and the Channel Islands. 
“4 corymbosum Lyngb. (incl. C. versicolor ae = ng of Corn- 
Devon, Dorset, Hants, Sussex, Kent, ——, 
oo a a (Berwick), Cheshire (Hilbre feland). Isle 0 ; 
Wa les ne lesea). Sco land ; Edinburgh eons Fife (Macie 
: inv 
w; Dublin (Clontarf, M de); Dow 
(Bangor); Belfast Lough ; MY ee *Glnce (Kilkee). 
Channel Islands. Not uw uncomm 
Ayr (Salte aan West Kil bride). Ir ola nd: Wicklow ; : Dublin 
(Howth, Kingstown Harbour, crm dh : ee (Larne); Clare 
(Kilkee). Channel Islands. Not u 
Gen. 216. Sxrrospora Harv. 
Griffith zs" Harv. (= Callithamnion seirospermum Griff.). 
Giicts of Cornwall (Trevone, Whitsand d Bay, Torpoint); Devon 
an. tlan 
wall Bay); Bute (Ar ie, ze ad Mus (Portaferry) ; Galway 
(Roundstone), d t. (= C. seirospermum var. 
miniatum Crn.) Dorset [Wesmoutt, Studlan 
8. interrupta Schm. (= Callithamnion interr uptum Ag.). Coasts 
of Dorset (Swanage, Studland) and Sussex (Brighton). Very rare. 
S. hormocarpa Batt. (= sega inate hormocar aay Holm. ; 
C. byssoides £. seirosporifera Holm. & Batt. ). Coasts of Cornwall 
(Torpoint) ; poe (Bovisand, Piytiotth, Wembury) ; Doses (Stud- 
land). Very ra 
Dib Compsoruamniex Schm. 
Gen. 217. Compsornamnion Schm. 
C. thuyoides Schm. (= Callithamnion thuyoides Ag.). Coasts of 
Cornwall (St. Minver, sharagy Bay, Falmouth, Land’s End, 
: (Plymouth, Ilfracombe, Torqua ay, 
nae ital — (Brighton: oe (Yarm outh, Cromer); Isle 
ales (Swansea). Scotla d (Orkney ). Ireland (Wick- 
ion; Po ortaferry, Roundstone). Cheatial Lalaaits (Guernsey). Rare. 
