A. spinulosum and A. cristatum ” and in this view he is followed 
by Mr. D. C. Eaton. Eor my own part I am far from satisfied 
respecting its being a good species, and I only make it so pro¬ 
visionally, until more numerous and native specimens shall, as I 
trust they will ere long, be placed at my disposal. Of the 
American specimens the nearest affinity is with spinulosum , per¬ 
haps with var. dumeiorum (in structure, not in size); while Met- 
tenius’s German specimen, and our Windermere one, rather 
from the more rigid habit than any well-marked character, more 
resembles a gigantic A. rigidum; it approaches still nearer peiv 
haps a specimen of Asp. pallidum , Bory et Chamb., in my Her¬ 
barium, from Lycia. 
Plate 22. Pig. 1, 2, 3. Portions of a fertile frond of Nephrodium (Lastrea) 
remotum , Hook., from a cultivated Windermere specimen, derived from Mr. 
Clowes. 4. Primary pinna of a small sterile frond, from the same source:— 
natural size. 5. Fertile pinnule,— magnified. 6. Sorus ,—more highly mag¬ 
nified. 
