LASTREA DILATATA. 



301 



incTies, oblong-lanceolate in form, narrowing at the base 

 abruptly, and elongate-caudate at the apex. Piunse distant, 

 spreading slightly, and twisted upwards, the basal ones three 

 inches and a half long, and one inch and a half broad, 

 extremely unequally deltoid, the anterior basal pinnules being 

 only half the length of the posterior ones, the latter being 

 nearly pinnate. The basal pinnules of the upper pinnae oblong, 

 with a very blunt apex. Sori minute, numerous, a single 

 line on either side near the midrib of the small pinnules, 

 and on the lobes of the larger ones. I am indebted to Mr. 

 C. Elworthy, of Nettlecombe, for fronds. 



Fig. 24G — Basal pinna. 



CuRVATA, Loxce. (Fig. 246.) — This variety was found by 

 myself at Chaigeley Manor, near Clitheroe, in Lancashire. A 

 frond was sent to Mr. G. B. Wollaston, of Chiselhurst, who has 

 suggested Curvata as a suitable name. Length of frond twenty- 

 four inches, of which the lower eight inches are naked; width 

 ten inches, except the basal pinnae and near the apex, where 

 narrower. A somewhat slender, copiously soriferous form, and 

 having all the pinnae curving like a wide arch. In the basal 

 pinnae the inferior pinnvdes are much longer than the superior 

 ones, and more attenuated; in the other pinnae this difference 

 does not exist. Pinnules stalked, the lobes quite divided to 



2 R 



