98 DORYOPTERIS. 



Length of frond from eight to twelve inches. 



Venation regular, internal, reticulated, forming oblique-elon- 

 gated areoles. 



Sori marginal, linear, and continuous. 



Indusium narrow. 



The genus Doryopteris has some similarity to both Platyloma 

 and Cassebeera, yet those of Doryopteris are easily recognised 

 by their reticulated veins. The only difference between Dory- 

 opteris and Litobrochia appears to be in their habit, and that 

 is so distinct as to render it desirable to separate them from 

 Pteris. 



There is no British representative of this genus. 



