130 
POLYPODTACE.E. 
expanded frond ; figure c a pinnule, showing the veins and the 
points of attachment of the capsules ; and figure d another pin- 
nule, with the clusters of capsules in situ. 
The vignette below represents the Devil’s bridge in Cardigan- 
shire : it is well known to botanists as a rich fern locality, and the 
present species occurs in its immediate vicinity. 
