to paper. Tetraspores sometimes cruciate, but generally triangailarly divided,
immersed in the ramuli, near their apices, and generany disposed in longitudinal
series on the outer edge of the hrancHet. Favellæ sessüe on the
outer margin of the ramuli, subglohose, or irregularly shaped, occasionaüy
lobed, containing very numerous angular spores, and clasped by two or
thi-ee short, involucral ramuli.
We are informed by Mr. Turner, in his ‘ Historia Fucorum’,
that a specimen of this beautiful plant, of British origin, but
uncertain locality, had long been preserved in the Banksian
Herbarinm under the MS. name Fucus glandulosus, but remained
unpublished until Mrs. Griffiths, in September, 1803, fortunately
discovered it again upon the Devonshire coast, and enabled him
to figm-e and describe it for the ffi’st time. Since that period it
has been found, as far as I am aware, in hut two other British
stations, and in neither of them of such large size as in Torbay.
To Miss Warren of Flushing I am indebted for a great number
of specimens, and to Mrs. Griffiths for the fine specimen here
represented, and others in both kinds of fruit. I believe no one
in Britain but Mrs. Griffiths has yet found Favellæ. On the
continent, Microcladia glandulosa is decidedly rare, though found
along the shores of France and Spain. Professor J. Agardh
omits it in his ‘ Algæ Maris Mediterranei’, but Kiitzing has
received it from Marseilles. Bishop Agardh mentions specimens
from Kamtschatka, which, though somewhat different from the
European plant, he considers to belong to the same species.
This, if correct, is an interesting fact in the distribution of so
rare a plant.
As a genus, Microcladia is very closely indeed allied to Ceramium,
with which it agrees in habit, and merely differs in some
minor points of structure. Some specimens of Cer. rubrum nearly
resemble it, hut the absence of external joints in the Microcladia,
is a character sufficiently obvious to distinguish it from the Ceramium.
Microcladia glandulosa is often found tangled with other
Algæ, upon which it grows ; and sometimes, as Mrs. Griffiths
observes, creeps over them in the manner of a Cuscuta, throwing
out root-like fibres along the branches. These adhere so strongly,
that it is impossible to disengage them without laceration.
Fi<r 1 M ic r o c l a d ia g l a n d u l o sa -.-natural size. 2. A braachlet with
f-iveïïæ 3 A faveUa removed from its involucre. 4. Spores from the
same. ’s. A branchlet with tetraspores. 6. Tetraspores. 7. A longitudinal
section of the frond. 8. A transverse section of the frond -.— all r —