mostly;ptodt«sed-_ ~_ 
nately on each side the pinna. The fronds 
Is the case with the TricJiomanes, ~ - - 
virtually, as 
:hed series of rigid 
_ t of the 
Leafy margin. The 
_id the axis of a vein, 
__xginof the fronds, this v ; 
. ... _closed within an urh-shaped in- 
f two nearly orbicular compressed valves, ■; 
short stipes, by _ IPRMI, —- , 
dusters of spore-cases are produced around 
which is continued beyond the - 
* receptacle being 
volucre, consisting of two nearly orbicular compressed valves, ■; 
^SsTpecieTSw^Yy distributed^Loughout, the United 
Kingdom, and is found in many other parts of the world. 
m at ’ ” --'-e the same conditions for their 
genus the reader is referred. 
