the most abundant, and reaches a size much greater than it 
attains on the English coast. In sheltered bays, where the broad- 
leaved variety of Laminaria saccharina delights to grow, that 
plant is often seen covered with thick bunches of this Bryopsis, 
of an extraordinary size and luxuriance. ‘These are never ex- 
posed at low water, and can only be reached in a boat; but m 
shady channels and pools between tide marks, even at some dis- 
tance above the low water limit, specimens of nearly equal size, 
attached to smaller Algw, are frequently met with. 
Professor J. Agardh in his excellent work on the Algze of the 
Mediterranean, considers our B. Aypnoides to be merely a more 
advanced state of B. pluwmosa. It is possible that he may be 
correct in this conclusion, and I confess that ] have sometimes 
been inclined to a similar opinion, though I do not consider that 
I have before me sufficient data to warrant my adopting this view 
of the subject, in opposition to the observations of able natu- 
ralists, who have decided in the opposite way. ‘The question is, 
however, open to further enquiry, and I trust, before the con- 
clusion of this work to be able to speak more decidedly. At any 
rate the present figure will be useful to contrast with that given 
at Plate III. of the B. plumosa of British writers. 
Fig. 1. Bryopsis HypNoIDES :—the natural size. 2. Apex of a branch, with 
its lesser branches. 3. Part of one of the lesser branches, with ramuli :-— 
both magnified. 
