128 POLYPODIUM SACCATUM. 



lanceolate, acaminate, caudate, and subfalcate. Eight to ten 

 pairs, with an ultimate one; these are from eight to ten inches 

 long, and about an inch and a quarter wide. 



Veins external, prominent, widely apart, especially the basal 

 ones, compound anastomosing, forming hexagonal areoles. 



Sori transversely uniserial, from twelve to eighteen pairs on 

 each segment; circular. 



Sporangiferous receptacles deeply immersed, forming a row 

 of elevated, truncate, papilliform tubercles on the upper side 

 of the lacinise. 



Length of frond from two feet to two and a half. 



My thanks are due to Mr. J. Smith, Curator of the Royal 

 Gardens, Kew, for a frond of this species. 



It is not as yet to be procured from any of the Nurserymen. 



The illustration is from Mr. Smith's frond. 



