620 



FILICES. 



bilobatis, consistentu foliaceo ; venis (pinnulum) secondares 

 in venulas abeuntibus, simplicibus; venulis ad lobulorum 

 apices current. 



Sori oblongi in venulas oblique insidentes, in lobulis 

 solitarii. 



Indusiuni membraneum oblongum fornicatum basi obliqua 

 insertum, introrsum liberum. 

 Receptaculum nullum, conspicuum, capsulse stipitatae. 



1 . Pinnule of a young frond ? 



2. Do. Do. of a frond covered with sori. 



3. Portion of no. 1 . 



4. Portion of no. 2. 



5. Portions of nos. capsules removed, and the indusium bent 

 back. 



6. Same represented, one or two capsules remaining. 



7. Shews lateral insertion of indusium and its attachment 

 to an ultimate venule. 



8. Capsules. 9. Sporula. 



10. Represents a nephrodioid sorus, seen vertically and ob- 

 liquely. 



The venation of the divisions of the pinnulae is simple 

 ramose ; one branch supplies each lobe, and on it on one side 

 (never on the common vein) is situated the indusium. 



In one instance a distinctly Nephrodeoid sorus was seen. 



When the sori are limited in number : they alway exist on 

 the lowermost and uppermost of the venules of the division. 



Varies a good deal in habit : the divisions of the frond be- 

 ing occasionally ? crowded with sori and constracted : the 

 midrib of each pinna especially of the lowermost, caudately 

 elongated, and the pinnulae reduced to simple falcate Dareoid 

 lobes. 



The upper surface of the main vein of each pinnules, has on 

 either side, an elevated ridge, from which, opposite to the base 

 of the lobes arises, a stout subulate fleshy process. 



The same occurs, but of smaller size, on the midrib of each 

 of the lower lobes. 



