92 CETERACH OFFICINARUM. 
(indusium) of the sori are one on each side of each 
mass, membranous, continuous, quite distinct from the 
scales. 
In England it has been found near Lancaster ; 
abundantly about Settle, in Yorkshire ; on limestone 
rocks, in Lath-hill-dale, and in Dovedale, Derbyshire; 
on walls about the quarries at Ludlow, Shropshire ; on 
an old wall near Cowley, in Oxfordshire ; on a wall at 
Tocknells, near Painswick, in Gloucestershire ; at 
Martock, in Somerset ; at Stapleton Quarries, near 
Bristol ; at Cheddar, Malvern Abbey, and Bath ; on the 
tower of Old Alresford Church, Hants; on walls on the 
east and north-east side of Winchester; at Topsham, 
and other places, in Devon ; at Bury, in Suffolk ; 
Heydon, in Norfolk ; and Asheridge, in Hertfordshire. 
In Wales, in Denbighshire ; on the walls of a ruin at 
Treborth, near Bangor. In Ireland, on the ruins of 
Saggard Church ; on walls near Cork, and Kilkenny ; 
on Cave-hill ; and at Headford, in Galway. In Scot- 
land, it has been found near Drumlanrig, in Dumiries- 
shire; on the ruins of Tona; at Drumlanrig Castle; 
and at Kinoul Hill, near Perth. (Cottage Gardener, 
xv. 398.) 
We have never attempted to cultivate this Fern, and 
must borrow from Mr. Charles Johnson the following 
remarks upon the subject : 
" It is not at all easy to cultivate this fern Successfully : 
it is too impatient of confinement to live long in a green- 
house ; and the cold frame, so useful for the protection of 
other half-hardy species, is almost certain death to this 
