LASTREA DILATATA. 



307 



the pinnules seem to have a narrowish equal wing throughout 

 its length, with which the lobes are adnate. Pinnules sessile. 



Fig. 252,— Apex of frond and basal pinna. 



Brownii, Lowe. (Fig. 252.)--A very slender distinct variety, 

 found near Kirkaldy, in Scotland, by Mr. Archibald Brown. 



