the expanded fronds of Lam. digitata, where it often fringes the
segments in continuous tufts, but it is not confined to that plant,
but is commonly found also on L. bulbosa and on Himantlialia
lorea, and others of the larger fucoid Algæ. When young and
well grown it is a very handsome species, but soon becomes
coarse and ropy, and towards the close of the season is very much
infested with Biatomaceous parasites.
I have received numerous specimens from correspondents in
North America, in which country this would appear- to be one
of the most abundant of the genus.
The silicules are generally strictly sessile, but vary in form
from linear-subulate to nearly ovate-acute.
fil
Fig. 1. E ctocakpus fasciculatus -.— the natural size. 2. Branch with fasciculate
ramuli. 3. Brancldet with silicules :— hotJi magnified.
