208 BRITISH MARINE ALG. 
men I have ever seen of this rare species was brought from the south 
of Europe. Tetraspores are contained in little iuvolucres, borne on short 
stalks, being transformations of lateralramuli. The colour of this plant is 
a full rose-red, and the fronds adhere very well to paper in drying. G.barbata 
(Fig. 190) is another very rare species, which has been taken some seasons 
at Weymouth, and found occasionally by myself on the beach at Brighton. 
In the rock pools at Jersey it is found very frequently; the pretty 
tufted fronds being about 3in. high, and of a lovely rose colour; but 
none of the specimens taken by me on the Brighton shore exceeded 2in. 
in length, and as they were usually wave-worn before they were picked 
up and mounted, their delicate filaments were more or less faded, and 
only some vestiges of colour remained in the terminal branches. Fig. 190, 
b, represents the upper portion of a branch highly magnified, showing the 
beautiful elongated cells of the stem and the whorled ramelli which are 
set around the joints, on the inner faces of which, near the stem, are 
seated the oval or globular tetraspores. These tufts of multifid ramelli 
are very similar to the byssoid fibres on some of the Polysiphonie, 
and their beard-like character, in the plant before us, has suggested 
the specific name of barbata. .This is the smallest and most attenuated 
of all the Griffithsie. It is sometimes mistaken for a Callithamnion, 
but the joints of its stems and branches (which are six or eight times 
as long as broad), in addition to the whorled tufts of jointed ramelli, all 
of which are distinctly apparent, even under an ordinary lens, are 
characters sufficiently definite to distinguish it at once. One of the 
most graceful of this elegant tribe of red seaweeds, is the very rare 
‘species G. Devoniensis, which was discovered by the Rev. Mr. Hore, 
at Plymouth, in 1840. This justly admired plant grows in muddy 
places rarely uncovered by the tide, even at low water. I never failed to 
find it during the summer, cast up on the mud banks opposite the Devon- 
port dockyards. I also dredged it, or rather scraped it up in quantity 
by means of a long rake (taken by my boatman for the purpose) outside 
the banks of Beggar’s Island, near the mouth of St. Germain’s River. 
On one occasion, upon finding a specimen in splendid colour and fully 
in fruit, and well knowing the evanescent nature of its lovely rose-red tint, 
I washed the plant over the side of the boat, fixed it on glass, and 
covered it up from the light as soon as possible, and sailed back to my 
quarters at Plymouth with that peculiar feeling ef satisfaction which few 
but enthusiastic naturalists can appreciate. The filaments of this plant 
are about 3in. high, densely tufted, very slender, forked and fastigiate, 
or pointing upwards. The joints are cylindrical, and many times longer 
‘than broad. ‘Tetraspores are produced in involucres, which are whorled 
round the branches at the dissepiments or junction of the articulations. 
This isa peculiarity which serves to distinguish it from G. setacea (Fig. 192), 
which it otherwise very strongly resembles. ‘The filaments are much more 
flaccid than those of G. setacea, and are therefore rather difficult to 
mount easily in a natural position. Care must be taken always to wash 
