full rosy-crimson, discharged in fresh water, and becoming brown-red in 
drying. Sudstance extremely soft and subgelatinous. In drying the frond 
adheres most closely to paper. 
Until the fruit of this very remarkable plant shall be ascer- 
tained, its generic relations cannot be definitely fixed. I place 
it provisionally in Alsidiwm, as well on account of its general 
habit, as from the laxity of the cellular tissue of the stem ; but 
it may perhaps be more properly a species of Ahodomela ; bemg 
(like . comosa, which is otherwise very different) clothed in all 
the younger parts with byssoid ramelli, like those of a Dasya, 
to which genus also it seems to bear much affinity. 
The only specimen I have yet seen I owe to Mr. Clifton, by 
whose sister (Mrs. Brown) it was collected at the Vasse, a locality 
as yet but very imperfectly explored, but which promises to fur- 
nish many interesting Alge. 
Fig. 1. Atstp1um ? comosum,— the natural size. 2. Cross section of a branch. 
3. Small portion of a ramulus, bearing articulated ramenta :—the latter 
figures magnified. 
