1 10 LAND AND FRESH-WATER SHELLS. 



with Denbighshire) ; 50, Denbighshire, including outliers of the 

 county last named, also the detached portion of Flintshire; 51, 

 Flintshire (the detached or Overton portion is included with 

 Denbighshire); 52, Anglesey; 53, Lincolnshire South, divided 

 from North Lincoln by the Witham from its mouth at Boston 

 to Lincoln, thence by the Foss Dyke to the border of Nottingham- 

 shire; 54, Lincolnshire North; 55, Leicester and Rutland, 

 including a detached portion of Derbyshire; 56, Nottingham- 

 shire; 57, Derbyshire (a detached portion is included with 

 Leicester and Rutland); 58, Cheshire; 59, Lancashire South, 

 separated from West Lancashire by the River Ribble ; 60, 

 Lancashire West (the Furness district of North Lancashire is 

 included with Westmorland); 61, Yorkshire South-East, being 

 the East Riding of Yorkshire; 62, Yorkshire North-East, divided 

 from N. W. Yorkshire by the Rivers Wiske and Swale ; 63, York- 

 shire South-West, equivalent to the Southern division of the West 

 Riding, divided from Mid-West Yorkshire by the Leeds and 

 Liverpool Canal and by the River Aire below Leeds ; 64, York- 

 shire Mid-West, equivalent to the Northern portion of the West 

 Riding minus the Dent and Sedbergh district, which is included with 

 North- West Yorkshire ; 65, Yorkshire North- West, equivalent to 

 the western half of the North Riding with the addition of the 

 Dent and Sedbergh district of the West Riding; 66, Durham (the 

 detached portions are included with Northumberland and Cheviot- 

 land) ; 67, Northumberland South, includes a detached portion of 

 Durham, and is separated from Cheviotland by the River Coquet 

 and a line continued to Carter Fell from the Linn bridge ; 

 68, Cheviotland, equivalent to North Northumberland plus a 

 detached portion of Durham; 69, Westmorland and Furness ; 70, 

 Cumberland; 71, Isle of Man; 72, Dumfriesshire; 73, Kirkcud- 

 brightshire ; 74, Wigtonshire ; 75, Ayrshire; 76, Renfrewshire; 

 77, Lanarkshire; 78, Peeblesshire ; 79, Selkirkshire; 80, Rox- 

 burghshire; 81, Berwickshire; 82, Haddingtonshire ; 83, Edin- 

 burghshire ; 84, Linlithgowshire ; 85, Fife and Kinross ; 86, 

 Stirlingshire, including the detached portion of Dumbartonshire ; 

 87, Perth West and Clackmannan, separated from Mid-Perth by 

 the line of watershed which divides tributaries of the Tay from 

 those of the Forth ; 88, Perth Mid, separated from East Perth by 



