Crass II].—CRYPTOGAME. 
ORDER LX.—FILICKES. 
Genus CCXXXVIT.—POLYPODIUM (Linn.), Polypody. 
528. P. VULGARE (Linn.) Fairly common. 
Berriedale ; Rousay ; Orphir; Gillsburn, Scapa ; 
Stromness ; Brough, Deerness, &c. 
Genus CCOXXXVIII.—HYMENOPHYLLUM (Sm.) 
529. H. Witsont (Hook.), Falmy Fern. Rare. 
Hoy Hill and meadow of the Kame—the only 
known stations. It is so like a moss that it may 
readily be mistaken for one. 
Genus CCXXXIX.—PTERIS (Linn.), Bracken. 
530. P. aquitina (Linn.) Common. 
Genus CCXL.—BLECHNUM (Linn.), Hard Fern. 
531. B. Sprcant (With.) Common. 
Genus CCXLI.—-ASPLENIUM (Linn.), Spleenwort. 
532. A. ADIANTUM-NIGRUM (Linn.) Rare and local. 
Rousay ; Evie; Westray ; Syradale ; Hoye Harray. 
Gathered by me in Rousay in 1894. 
