368 
HISTORY OF BRITISH FERNS. 
Thames. —Middlesex. Kent. Surrey. Hertfordshire. Ox¬ 
fordshire. Essex. 
Ouse. — Suffolk. Norfolk. Cambridgeshire. Bedfordshire. 
Huntingdonshire. Northamptonshire. 
Severn. — Warwickshire. Gloucestershire. Herefordshire. 
Worcestershire. Staffordshire. Shropshire. 
S. Wales. —Glamorganshire. Carmarthenshire. 
N. Wales. —Anglesea. Denbighshire. 
Trent.— Leicestershire. Rutland. Lincolnshire. Derbyshire. 
Nottinghamshire. 
Mersey. —Cheshire. Lancashire. 
Humber. —Yorkshire. 
Tyne. —Durham. Northumberland. 
Lakes. —Cumberland. Westmoreland. 
W. Lowlands. —Dumfries-shire. Kirkcudbrightshire. Renfrew¬ 
shire. Lanarkshire. 
E. Lowlands. —Roxburghshire. Berwickshire. Edinburgh¬ 
shire. 
E. Highlands.— Clackmannanshire. Kinross-shire. Fifeshire. 
Perthshire. Forfarshire. Aberdeenshire. Morayshire. 
W. Highlands. —Dumbartonshire. Loch Skyros, Islay (with 
var. “simplex”). 
N. Highlands. —Ross-shire. Caithness-shire. 
N. Isles. —Kirkwall, Orkney, J. T. Syme . Shetland. 
W. Isles.— N. Uist. Harris. Lewis. 
