304 Wilson's filmy fben. 



to the specimens, can only find the present species, which is most ahundant 

 on rocks and stones throughout the Snowdon district, at Ehayadr-y-Wenol, 

 falls of the Lugwy, Capel Cerig, Rhayadr-Mawr, near Llanberis, &c. 



Meeionethshiee. — I have observed it in abundance at Ehayadr Du 

 near Maentwrog, and at Rhaidr-y-Mawddach near Llaneltyd ; and Mr. H. C. 

 Rothery found it, growing in company with H. tunbridgense, in the vale 

 of Festiniog. 



Caediganshtee. — Mr. Lees has observed it ia some quantity on rocks 

 close to Pont Bren, or the Parson's Bridge. 



Beeoknockshiee. — Mr. Ealfs informs me it is common among the 

 mountains in this county. 



Glamobganshibe. — On rocks some way below the Melincourt fall, and 

 also on rocks near the Scud-einon-Gam : Mr. E. Young. 



Eetuming into England, we find this species in two western counties. 



Devonshieb. — The Rev. W. S. Here and Mr. Ward inform me that it 

 occurs, in company with H. tunbridgense, upon rocks and large blocks of 

 granite adjoining the Plym, above Shaugh Bridge, and, Mr. Here adds, in 

 much greater abundance, at Westman's Wood, Dartmoor ; Mr. Ralfs and 

 Mr. Borrer have also found it in ravines at Dartmoor ; and Miss Grifiitlis 

 at Tynemouth, North Devon, and Bickleigh Wood, South Devon. 



CoENWALL. — Miss Warren has found it at Granite Tor ; Mr. Ralfs and 

 Mr. Greenwood at Cam Brea, near Redruth; Mr. Babington and Mr. 

 Borrer in abundance at Rough Tor, near Camelford. 



Tn Ireland this fern is much more common than in England, and 

 grows with a beauty and luxuriance that I have not witnessed elsewhere : 

 it is more generally distributed over the island than H. tunbridgense, and 

 whereas H. trmbridgense exhibits something like a preference for shade, 

 warmth and shelter, H. unilaterale establishes itself on bleak and exposed 

 rocks. I subjoin a few localities. 



Donegal. — The late Mr. Templeton found a Hymenophyllum on the 

 Ennishowen mountains, which the late Mr. W. Thompson behoved to be 

 this species. 



LoNDOMDERE-Y. — Mr. Moore possesses specimens collected in this county. 



Akteim. — The late Mr. W. Thompson thought this to be the species 

 noticed in the MSS. of the late Mr. Templeton, under the name of H. 

 tunbridgense, as having been found by him in Cohn Glen, near Belfast : 

 at the time the record was made, the name of tunbridgense was applied to 

 both species. Mr. Templeton also found it by the Glenarve river, near 

 Cushendall. 



Down. — The late Mr. W. Thompson informed me that he collected this 

 species in Tullamore Park, and on the Mourne mountains. 



Fekmanagh. — The late Mr. W. Thompson mformed me that the Hon. 

 J. L. Cole found this species near Florence Court. 



