Page:Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne (1867).djvu/87

Rh Darlington, Gateshead, Hartlepool, Stockton, Sunderland, South Shields, Sedgfield, Stanhope, Staindrop, and Wokingham. As the map will show, we have traced out eleven drainage districts, the first four of which correspond to the Cheviot-land vice-county of Watson's Cybele Britannica, the second four to his southern division of Northumberland, which we may call Tyne-land, and the last three to the county of Durham. In round numbers we may say the area of Cheviot-land is 800 square miles, of Tyneland 1150 square miles, and of Durham 950 square miles; and we would ask the special attention of our readers to these vice-counties, as we intend to give a separate list of the plants of each, or, to speak more accurately, to give, under each species, the initial letter C, N, and D of the vice-counties in which it grows. The districts which we have defined are as follows:— 1. 1. Tweed and Till district. 2. North-eastern district. 3. Aln district. 4. Coquet district.

2. 5. Wansbeck district. 6. North Tyne district. 7. South Tyne and Allen district. 8. South-eastern district.

3. 9. Derwent district. 10. Wear district. 11. Tees district.

We give, in the first place, a table, showing the distribution of the one hundred and eight boreal species through the eleven drainage districts.