96 
A SELENIUM LANCE OLATUM, 
and shorter. Pinnules obovate, obliquely ovate, or dimi 
diately snb-qnadrate, the anterior side most developed, 
more or less coneate at tiie base ; in large fronds 
pinnatifid below, with obovate sharply-toothed lobes, 
coarsely-toothed above, the teeth mncronate ; in 
smaller fronds coarsely mucronately-toothed. Occa¬ 
sionally the lower pinnae are longer; sometimes the 
fronds are narrow and only pinnate, with lobed 
pinnae; and occasionally they are membranaceous. 
Venation (pinnules) consisting of a flexuous mid¬ 
vein ; veins alternate, the lowest anterior directed 
to the principal lobe, the venules which proceed 
from it extending one into each tooth, but not quite 
reaching the margin; the other veins are forked or 
simple, and correspond in number with the marginal 
teeth ; their termination is marked by a depression of 
the upper surface. Fructification dorsal, scattered 
over the whole surface. Sori indusiate, oblong, borne 
on the anterior side of the venules ; that is, above the 
fork of the veins occupying rather the centre of the 
lobes than the centre of the pinnules ; at first distant, 
but becoming confluent in irregular masses on the 
lobes, which gives them a sub-marginal appearance; 
occasionally they are set back to back on the venules. 
Indusium white, oblong, slightly irregular, and wavy 
on the free margin. Spore-cases globose. Spores 
ovate, angular, roughish. 
This beautiful species was found in 1884, by the 
Rev. Mr. Baker, near Ulverston. 
