138 baker's north YORKSHIRE. 



side of the river the following are the species which furnish 

 the most striking instances of this exceptionality. Polygala 

 ausiriaca, a species diffused upon the Continent from Scandinavia 

 southwards to Italy and Transylvania, is elsewhere known in 

 Kent and Surrey only in Britain. Potentllla fruticosa and 

 Gentiana verna, both of which are abundant in Teesdale, and 

 both widely diffused upon the Continent, grow in the West of 

 Ireland and sparingly in the Lake District, but are not known 

 elsewhere in Britain. Bartsia alpina grows in Craven and 

 the Lake District, and from thence leaps to the East Highlands. 

 Elyna caricina is like the Bartsia, except that it is not known in 

 Craven. Myosotis alpestris and Tofieldia palustris from Tees- 

 dale leap to Perthshire ; and Hieracium iricum and Carex 

 capillaris are also known in Craven, but not in the Lake Dis- 

 trict, and leap from Yorkshire to the hills of Dumfriesshire. 



The Lune rises upon the edge of the county and the southern 

 slope of Mickle Fell, and runs due east along the edge of the 

 fault for seven miles. Lunedale at its upper part is a broadly 

 undulated hollow with a good road at the bottom, but with very 

 few houses, and with its slopes on either side but little diversi- 

 fied by cliffs. The streamlet which flows from the east end of 

 the Mickle Fell ridge forms a small waterfall over a gritstone 

 edge and runs through a lonely mountain tarn about half-a-mile 

 in circumference, upon the banks of which grow Ranunculus 

 coenosus, Allosorus crispus, Mnium subglobosum, Hypnum stra- 

 mineutn and H. exannulatum. Passing Howgill and the dark 

 Scotch fir plantations of Wemmergill, which latter runs up to the 

 south slope of Green Fell, three miles from the junction of the 

 Lune with the Tees the fault crosses it and continues along the 

 south side of the dale till it opens out into Teesdale. On the 

 Durham side of the Tees opposite Lunedale is Middleton, the 

 mining capital of the dale. South of the fault is a wide surface 

 of moorland country of the eugeogenous type of character. Its 

 two principal dales are Balderdale and Deepdale, both of which 

 have pleasant rocky stream channels and thick woods in their 



