1900] Setchell, — The New England species of Laminaria 145 
(1884, pl. 8, f. 2 and pl. 6, f. 1) are very characteristic. It is a plant 
of the tide pools of the littoral zone and of more or less exposed 
shores in the uppermost part of the sublittoral zone. It is found 
plentifully from Nahant northward, but the writer has never seen a 
specimen of this form from south of Cape Cod. 
3. L. INTERMEDIA Foslie. The weak, almost cylindrical stipe of 
this species, together with the usually ample and slightly divided 
blade, serve to distinguish it from others of the digitate section with- 
out mucilage glands in the stipe. It has been found with us only 
from the southern portion of the coast of New England. The writer 
has found it growing in great abundance, in the upper sublittoral zone 
(1-2 fathoms) at Ram Island near Noank, Conn., and H. M. Richards 
has brought it up from a depth of 4—5 fathoms off Newport, R.I. It 
has also been washed ashore at Newport, at Watch Hill and at New 
London. The forms of Z. intermedia, as described by Foslie, have 
all been found at the Ram Island locality and near one another. The 
f. ovata is the one most commonly cast ashore. 
f. LONGIPES Foslie. The long-stiped form is not common with us, 
but occasionally a specimen occurs which may be referred here. 
f. CUCULLATA Foslie. The f. cucullata is, when well developed, a 
very distinct plant. As it occurs at Ram Island, with its short stipe 
and ample, very cucullate blade, split often into only three or four 
broad divisions, it looks unlike any form of Z. digitata, but as cast 
ashore in smaller form, it is neither so cucullate nor so ample, yet has 
an entirely different aspect from any other digitate species.  Foslie 
has given a very characteristic figure of it (1884, pl. 9, f. 2). 
f. ovATA Foslie. Entire forms of this species are fairly common, 
and are especially to be found washed ashore. They appear to be 
rather young and undeveloped specimens. A typical plant is figured 
by Foslie (1884, pl. 1o, f. 17.) 
4. L. STENOPHYLLA Harvey. While what has seemed to the 
writer to be true Z. stenophylla, is to be classed with Z. intermedia, 
as regards the weakness and cylindrical form of the stipe; the 
affinities are rather with Z. digitata as far as the numerous, narrow 
divisions of the blade are concerned. The stipe is very weak and 
almost cylindrical throughout its length; the blade is very narrow and 
decidedly cuneate at the base, and the divisions of the blade are rela- 
tively very numerous, narrow and deep. The plants seen by the 
writer all grew at the lower limits of the littoral zone, on exposed 
shores and on a substratum of mussels. The only localities where 
the plants were studied were Peak’s Island and Nahant. In both 
of these places, the plants were exposed to heavy wave action. It is 
also found occasionally cast ashore. It has not been seen on the 
coast to the south of Cape Cod, with the exception of a few speci- 
