LOCAL DISTRIBUTION. 277 



approaching latifolium), H. B. M. Harris, B.S.E. So- 

 mersetshire. 



CHANNEL. Isle of Wight. Hampshire. Dorsetshire. Wilt- 

 shire. Tunbridge Wells (var. convexum), Miss Bower, 

 and elsewhere, Sussex. 



THAMES. Hertfordshire. Kent. Portnall Park Virginia 

 Water and Shirley (var. convexum) ; Mayford (var. molle), 

 and other parts of Surrey. Oxfordshire. Essex. 



OUSE. Suifolk. Norfolk. Cambridgeshire. Bedfordshire. 



SEVERN. Arbury Park (with the vars. convexum and molle), 

 and in other parts of Warwickshire. Gloucestershire. 

 Newport, Monmouthshire. Worcestershire. Staffordshire. 

 Shrewsbury, &c., Shropshire (var. convexum as irriguum). 



S. WALES. Brecknockshire. Glamorganshire. Carmarthen- 

 shire. Pembrokeshire. 



N. WALES. Anglesea. Denbighshire. Flintshire. Aber (var. 

 convexum as irriguum) , &c., Carnarvonshire. 



TRENT. Leicestershire. Nottinghamshire. Derbyshire. Rutland. 



MERSEY. Cheshire. Lancashire. 



HUMBER. Yorkshire ; also Mickley Barrows (var. convexum). 



TYNE. Northumberland. Durham. 



LAKES. Keswick, Cumberland (with var. latifolium), Miss 

 Wright. Westmoreland. 



W. LOWLANDS. Dumfriesshire. Kircudbrightshire. Ren- 

 frewshire. Lanarkshire. 



