parted, oblong, terminating the branches of the horizontal ramuli. Colour, 
a brilliant crimson, given out in fresh water. Sudstance gelatinous. The 
frond adhering closely to paper in drying. 
One of the rarest of the British Algze, scarcely known except 
on the southern shores of England, and there only im a few 
stations, and nowhere in great abundance. Perhaps one cause of 
its comparative rarity is its place of growth. Being a deep-water 
species it is rarely found except when cast ashore after a gale, 
or when sought by dredging. In the former case the specimens 
are frequently very flaccid, and faded in colour. I am not 
aware of its having been found in Ireland except, many years 
ago, by Miss Hutchins. 
There is considerable difference in structure and also in 
appearance between young and old plants. In the former the 
axis is a simple, joimted filament, not very unlike that of a 
Griffithsia, whorled at short intervals with beaded fibres. But 
as the plant increases in age, the axis becomes more compound 
until it consists of a bundle of closely packed filaments; and 
then the branches become thicker and more cylindrical. Favel- 
lidia are commonly produced in abundance. Tetraspores are 
much more rare. 
Fig. 1. DupREsNalA coccINEA :—of the natural size. 2. Portion of a young 
branch, with tetraspores. 2. Ramulus from the same. 4. Tetraspores 
and portion of ramulus. 5. Portion of branch with favelle. 6. Favella 
and ramuli from the same :—all magnified. 
