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HISTORY OF BRITISH FERNS. 
Channel. — Hampshire. Dorsetshire. Wiltshire. Tilgate 
Forest, Sussex. 
Thames, — Tring, Hertfordshire. Hampstead, Middlesex. High- 
down Heath ; Caesar’s Camp, Farnham ; Woking Common ; 
between Dorking and Leith Hill ; Addington Hills, Croy- 
don; and other parts of Surrey. Oxfordshire. [High 
Beech, Essex.] 
Ouse. — Norfolk. Gamlingay, Cambridgeshire, Bedfordshire. 
Severn. — [Coleshill, Warwickshire.] Worcestershire. Staf- 
fordshire, Stiperstone, Shropshire. 
S. Wales. — Glamorganshire. Plinlymmon, Cardiganshire. 
N, Wales. — Cader Idris, Merionethshire. Denbighshire. Snow- 
don, Carnarvonshire. 
Trent. — Charnwood Forest, Leicestershire, Nottinghamshire, 
Denbighshire. 
Mersey. — Todmorden ; Simmons- wood Moss, Lancashire. 
Cheshire. 
Humber.— -Frequent in the N. and W. Ridings of Yorkshire. 
Tyne. — Northumberland. Durham, 
Lakes. — Mountains of Cumberland. Langdale, Westmoreland, 
W. Lowlands. — Dumfries-shire, Kircudbrightshire. Renfrew- 
shire. Lanarkshire. 
E. Lowlands. — Peebleshire, Roxburghshire. Pentland Hills, 
Edinburghshire. Berwickshire. 
E, Highlands. — Clackmannanshire. Kinross-shire. Fifeshire. 
Clova Mountains, Forfarshire. Ben Lawers, Perthshire. 
