CHAPTEE XII. 
THE FILMY FERNS. 
Plate 8. 
HE Filmv Ferns form a sort of connect- 
fj 
ino* link between Ferns and mosses. 
o 
They are the tiniest of all the British 
Ferns, forming little tufts sometimes 
only one inch in length; but sometimes growing 
to a length of six inches. Their semi-pellucid and 
filmy nature is sufficiently expressed in the common 
name given 'to them. The British group of these 
pretty little Ferns is a tiny one, including only two 
species, namely;—1. The Tunbridge Filmy Fern 
(Hymenojphyllum tunbridgense ), and 2. The One¬ 
sided Filmv Fern (HymenojoJiyllum unilatercile ). 
d d 2 
