THE TUNBRIDGE FILMY FERN. 133 



with mosses either on rocks, on tree-trunks, or on the 

 ground. It is also found on boulder rocks in mid- 

 stream, and generally in or near streams, on rock- 

 covered hills or uplands within the influence of the 

 moist emanations from neighbouring streams ; and the 

 hollows, crevices, or sides of waterfalls are favourite 

 habitats, this species often growing almost in darkness in 

 rocky fissures, whose external and frequently internal 

 sides it completely drapes. A very slight depth of 

 earth suffices for root-room, and oftentimes the carpet 

 of its matted roots and rhizomas appears to cover 

 nothing but the moist surface of bare rocks. 



WHERE FOUND. In England, in the counties of 

 Chester, Cornwall, Cumberland, Derby, Devon, Kent, 

 Lancaster, Northumberland, Somerset, Stafford, Sussex, 

 Westmoreland, and York. The following are the espe- 

 cial localities for this species in the counties named. 

 In the county of Chester : the neighbourhood of Buxton, 

 Croydon Brook, and Macclesfield. In Cornwall, Rough 

 Tor, near Camelford, and the vicinity of Penryn. In 

 Devonshire, on Dartmoor, namely, at Becky Fall (near 

 Moreton Hampstead), in Bickleigh Vale, by Shaugh 

 Bridge, on Staple Tor, and on Vixen Tor. In Kent, 

 vicinity of Tunbridge Wells. In the county of Lancaster, 

 Cliviger, Conistone, Greenfield, and Rake-Hey Common. 

 In Somersetshire, near Shepton Mallet. In Sussex, 

 Ardingly, Balcombe, Cockbush (Chichester), Hand- 

 cross (Tilgate Forest), and West Hoathley. In 

 Yorkshire, the vicinity of Halifax and Esk Dale, 

 neighbourhood of Whitby. In Wales, in the coun- 

 ties of Anglesea, Brecknock, Caernarvon, Glamorgan, 

 and Merioneth ; and in the following localities : in 

 Glamorganshire, Cilhepste, Waterfall, Melincourt Water- 

 fall, and Pont-nedd-Vechan. In Merionethshire, Cader 

 Idris, Cwm Bychan (in the vicinity of Barmouth), 

 Crafnant (in the neighbourhood of Harlech), Dolgelly, 

 Vale of Festiniog, and Rhaiadr Du (in the neighbour- 



