CTSTOPTERIS DENTATA. Ill 
at the foot of the walls of Castle Dinas Bran ; in Flint- 
shire, at Llangollen; in Denbighshire, on rocks north of 
the mansion of Trejorwerth. in Anglesea, and on 
Snowdon. In England it has been found between 
Widdy Bank, and Caldron Snout, in Durham. 
It may be cultivated, probably, the same as directed 
for C. alpina. 
