CRYPTOGAMIA. ALG. Fucus. E, (2) Flat, ribless, 
PELLUCID. , 
- Further observations are wanting to determine whether it be 
really a distinct species. I suspect that the processes from the 
edge of the leaves may be other leaves in an unfinished state of 
growth. 
F, hgulatus. Gmelin. But that name having been given by 
Mr, Lightfoot to another well established species, it could not 
be retained. 
Specimens from Mr. Srackuouse, gathered on the coast of 
Cornwail, — 
103 
F, Stem short : leaves membranaceous, without a mid-holoceta’- 
rib, edged with prickle-shaped teeth and producing  ceus. 
similar prickles on both surfaces. 
, Gmelin 21. 2 
Membranaceous, firm, diaphanous, without a mid-rib, 
branched, » inches over, branches alternate, somewhat winged. 
Primary leaf 1 inch broad, secondary 2 lines; edges fringed . 
with distant, upright bristles differing in size, simple or forked. 
Both surfaces have some of these bristles which are stiffer and 
sometimes hooked. Gmelin. Stem 3 of an inch high; whole 
plant from 3 to 5 inches high; blood red. Leaves from 3 to 
‘near 7 an inch broad, the former not branched, but all of them 
edged with prickle-shaped substances the same as those on the 
surface. These vary much in size, are sometimes compound, 
but have never the appearance of fructification like the fringe 
in the F. laciniatus. eee 
F. holosetaceus. Gmelin. 
Var. 2. Leaf simple, 1 to 13 inch long. 
__ Mr. Lightfoot arranged this as a variety of his F. ciliatus, 
but the existence of the prickles and the length of the stem ina 
duce me to consider it as a young plant of the F. holosetaceus. 
On rocks and stones in the sea; chiefly in the Summer and 
Autuma. [On the Cornish coast. Mr. Srackuouse.] 
F.. Leaves flat, membranaceous, without a mid-rib; chain-pro‘lifer. 
like-proliferous, cloven at the end. ceca 
' Lightf. 30, at p. 949-Fl. dan. 708. 
Membranaceous, red, without a mid-rib, 4 or 5 inches long, 
a single leaf about 2 of an inch broad. Proliferous from the 
surface, not from the edge: shoots forked. Fructifications red 
spherical warts scattered on the surface of the leaves, smallerthan 
. @pin’shead. Licutr. — : . 
i variety of this may be expected in Mr. Stack~ 
A singular 
house’s second fasciculus of British marine plants. He tells me- 
it is proliferous only at the edges and at the lacerations, and 
