130 BRITISH FERNS. 
of the Azores, and I possess specimens collected in 
Madeira. It has been found somewhat abundantly in 
the South of Ireland. In Great Britain its range is 
extremely limited, and its localities strangely diversified 
as regards altitudinal and geological conditions. It 
is entirely absent, as far as my information ex- 
tends, from Scotland and North and Central England. 
The following localities may be relied on :—In Caer- 
narvonshire, near Llanrwst, on rocks near Tremadoc, 
and plentifully on Carry-y-Imbill, a bold and almost 
rock at the entrance of Pwllheli Harbour: 
in Merionethshire, abundantly on an old wall and on 
_ Yoeks between Dolgelly and Barmouth, also at Bar- 
_ mouth; on the road between Tan-y-Bwlch and Aber- 
gathered it in both counties: I mention these localities 
"elahe becanse I have guihered or seen the speci 
