ALGJE OF TASMANIA, 437 
character of a Dasya, that at first sight, I had referred it to 
that genus. A closer inspection, however, showed that it 
could not be generically separated from Polysiphonia bys- 
soides, with which species the structure of its stem and of its 
Tamelli precisely agrees. Both species, indeed, form a close 
link with Dasya. 
10. Polysiphonia Gunniana, Harv.; caule longissimo, crasso, 
sub-inarticulato, striato, alterné ramosissimo ; ramis pri- 
mariis elongatis, distantibus, cauli similibus, articulatis ; 
secundariis ramulis dichotomé multifidis roseis pinnatis; 
. ramulis flabellatis, multoties dichotomis, sensim attenuatis, 
et in filis monosiphoniis byssoideis, roseis desinentibus ; 
articulis omnibus diametro sesqui-vel duplo longioribus; 
keramidiis (magnis) globosis, sessilibus; stichidiis lanceo- 
latis, acuminatis, ad apices ramulorum. 
George Town, V. D. L., Ronald Gunn, Esg., n. 1965, 1266. 
—Stem 8-10 inches long or more, more than half a line in 
diameter at base, gradually attenuated upwards, repeatedly 
and at length excessively branched, inarticulate below, 
more or less evidently so above. Branches resembling the 
‘Stem, long, as thick as or thicker than hog’s bristle, some- 
what flexuous, twice or thrice alternately divided; the pen- 
ultimate branches flabellate (the fans half an inch or more in 
breadth) regularly circumscribed, many times dichotomous, 
gradually attenuated ; many-tubed below, but less and less 
Compound upwards, and ending in single-tubed, coloured, 
dichotomous filaments, which are exactly similar to those of 
Dasya. Colour a brilliant rosy red or crimson, as in 
P. elongata rosea. Substance tender, but not very gelatinous, 
adhering to paper. Capsules very large, seated on the dicho- 
'tomous ramuli, sessile or nearly so, at first ovate, afterwards 
globose or nearly ‘spherical; the pericarp thin and mem- 
branous. Stichidia resembling ‘closely those of Dasya, but, 
in the specimen examined, without spores, situated at the 
Apex of the polysiphonious portion of the ramulus, and termi- 
nating it;—they seem therefore as if ‘nestling among the 
Pencilled one tubed filaments which are produced far beyond 
