THE SEA SPLEENWORT. 95 
N. Isles.—Orkney : Hoy and Mainland, T. Anderson, who found 
it growing on the inside of St. Magnus' Cathedral, from whence it 
is now eradicated by repairs. 
W. Isles.—Little Barve, Harris. Shiant Isles. 
Ulster.—Down: Newcastle, W. Thompson. Isle of Rathlin. 
Cavan: Mullaghmore. 
Connaught.—Abundant along the coast, Dr. Mackay. Galway: 
Connemara. Arran Isles, D. Oliver, Jun. 
Leinster.—Dublin : Hill of Howth; Killiney Bay, G. Lloyd. 
Munster.—Abundant along the coast, Dr. Mackay. Kerry: Kil- 
larney, Z. Newman (inland) ; Derrynane ; near Dingle, R. Barring- 
ton. Cork: rocks on south coast; Clonmel, J. Sibbald. 
Channel Isles—Guernsey: Petit Bot Bay; Torteral, Rev. Mr. 
Dobree; north and east coast; occurring also on an inland church 
two miles from the sea, C. Jackson. Jersey, J. Piquet. 
This littoral and rupestral species is in Europe most abundant 
in the western part, oceurring in Great Britain, Ireland, Spain, 
Portugal, France, Corsica, and Italy, extending, however, eastward 
to the Mediterranean, since it is found in the Balearic and the 
Ionian Isles. From Spain it crosses to Barbary and Tangiers, on 
the African coast; and it is again found in Madeira, the Azores, 
and the Canaries. More southward it appears in St. Helena, accord- 
ing to a speeimen in the Hookerian Herbarium, and also according 
to Heufler, on the authority of the younger Jacquin's collection. 
Sir W. Hooker’s Herbarium also contains specimens marked as 
having been brought from New Holland and. Rio Grande, together 
with others of small size from New Brunswick, and similar ones 
from North America, not specially localised. The figure of Plu- 
kenet, usually quoted for this plant, and if correctly so, giving it a 
West Indian habitat, may equally be taken for Asplenium dentatum. 
The distribution of this species, Mr. Johnson observes,* extending 
from the north of Africa and the Canaries and Madeiras, along the 
shores of Spain and France, and its absence from other parts of 
Europe apparently well authenticated, is a curious geographical 
phenomenon, pointing to a probability of its having taken place 
* Sowerby, Ferns of Gt. Brit. 52. 

