52 A CATALOGUE OF THE BRITISH MAUIN1C 



Gen. 13G. HALIDRYS Lyngb. 



H. siliqiiosa Lyngb. Coasts of Cornwall, Devon, Dorset, Hants, 

 Sussex, Kent, Essex (Harwich), Suffolk (Felixstowe), Norfolk 

 (Cromer), Yorks., Durham, Northumberland, Cheshire (Hilbre 

 Island), Isle of Man, Wales, Scotland, Ireland, and Channel 

 Islands. Common on the rocky shores of the British Islands. 

 /^ silicitlosus (= F. siliculostts Stackh. ; H. siliquosa fi minor Turn, et 

 var. gracilis Holm. & Batt.). Coasts of Cornwall (Polkerris, near 

 Fowey) ; Devon (Torquay, Sidmouth) ; Dorset (Swanage) ; North- 

 umberland (Berwick) ; Bute (Cumbrae). Probably not uncommon. 



Gen. 137. CYSTOSEIRA Ag. 



C. ericoides Ag. Coasts of Cornwall (St. Miiiver, Padstow, 

 Mount's Bay, Falmouth, Looe); Devon (Plymouth, Torbay, Teign- 

 mouth, Sidinouth, Salcombe, Ilfracombe) ; Dorset (Swanage) ; 

 Hants (Isle of Wight); Norfolk (Yarmouth). Wales: Anglesea 

 (Llanvc^elog). Scotland: Argyle (Macrihanish Bay); Bute (Isle of 

 Cumbrae); Ayr (Ayrheads). Ireland: Bantry Bay, Co. Cork; 

 Miltown Malbay and Kilkee, Co. Clare. Channel Islands (Jersey, 

 Guernsey, Alderney). Not uncommon on the southern shores of 

 England, and South and West of Ireland ; very rare in Scotland. 



C. granulata Ag. Coasts of Cornwall (St. Minver, Mount's Bay, 

 Trevone Bay, Falmouth, Looe, Fowey); Devon (Torbay, Ilfra- 

 combe); Dorset (Weymouth); Hants (Isle of Wight); Sussex 

 (Bognor, Brighton); Norfolk (Yarmouth). Wales: Anglesea (Aber- 

 ffraw). Scotland: Ayr (Stevenston). Ireland: Bantry Bay and 

 Youghal, Co. Cork ; Larne and Portrush, Co. Antrim ; Ardglass, 

 Co. Down ; Magilligan, Co. Derry. Channel Islands (Jersey, 

 Guernsey, Alderney). Rather rare on the south coast of England, 

 and the West and South of Ireland. 



C. discors Ag. (= C. jceniculacea Grev.). Coasts of Cornwall 

 (Padstow, St. Minver, Falmouth) ; Devon (Plymouth, Torbay, 

 Ladrau Bay, Sidmouth, Ilfracombe) ; Dorset (Weymouth) ; Hants 

 (Isle of Wight) ; Sussex (Brighton); Kent (Dover, Folkestone); 

 Norfolk (Yarmouth). Ireland: Bantry Bay, Co. Cork; Kilkee, 

 Co. Clare ; Roundstone, Co. Galway. Channel Islands (Jersey, 

 Guernsey, Alderney). Rather rare on the south coast of England, 

 and the South and West of Ireland. 



C.fibrosa Ag. Coasts of Cornwall (St. Minver, Mount's Bay, 

 Falmouth, Fowey, Looe) ; Devon (Plymouth, Torbay, Sidmouth, 

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

 Sussex (Brighton, Selsea) ; Kent (Dover, Folkestone) ; Norfolk 

 (Yarmouth) ; Yorks. Ireland : Portrush, Co. Antrim ; Round- 

 stone, Co. Galway ; Kilkee, Co. Clare ; Bantry, Co. Cork. Channel 

 Islands (Jersey, Guernsey, Alderney). Not uncommon on the 

 shores of Southern England, and Northern, Western, and Southern 

 Ireland. 



Suborder TILOPTERIDE^: Thur. 



Gen. 138. TILOPTERIS Kiitz. 



T. Mertensii Kiitz. (= Ectocarpus Mertensii Harv.). Coasts of 

 Cornwall (Marazion, Falmouth, Mount Edgcumbe) ; Devon (Ilfra- 



