branches and stem, are perfectly opaque and thickly corticated ; the external 
coating of the branches being greatly thicker than the articulated 5-tubed 
axis. Mamelli alone are visibly articulated; the terminal articulation is 
acute; the rest about twice as long as broad; and the basal ones are nar- 
rowed towards the base. Ceramudia exactly ovate, without projecting orifice, 
containing a tuft of pear-shaped spores. Stichidia unknown. The colour 
is a dark-red, becoming almost black in drying. The sudstance is hard, 
close, and compact, coriaceous when dry, in which state the frond does not 
adhere to paper. 
This is a coarse-growing plant, remarkably different in that 
respect from most species of Dasya, to which genus, notwith- 
standing that its séichidia are unknown, I have no hesitation in 
referring it. It belongs to the section Stichocarpus, and appears 
to be most related to D. hormoclados, from which it differs widely 
in habit, in substance and colour, and in the form and position 
of its conceptacles. 
It appears to be a deep-water species, and rarely thrown up. 
The capsule-bearing specimens are shorter and more branched, 
the lateral branches being again divided, than that represented 
in our plate. 
Fig. 1. Dasya scopuLIFERa,—the natural size. 2. A ramulus, with a fertile 
branch, crowned with a ceramidium. 3. Tuft of spores, from the same. 
4. Ramelli. 5. Cross section of the stem :—all magnified. 
