1900] Setchell, — The New England species of Laminaria 147 
thrown ashore on the exposed beaches of the shore of Massachusetts, 
and also on those of Maine. The writer has seen it growing at 
Peak's Island, just below extreme low water mark. The blades of 
the latter specimens were noticeably broad. 
f. Puytuitis Le Jolis. The young plants of this form of JZ. 
saccharina, delicate in texture and color, are falcate in general out- 
line, and present so different an appearance from the young plants 
of the f. xormadis, that they certainly seem to belong to quite another 
form at least. As the frond thickens, the falcate shape becomes less 
distinct, but the blade remains plane, for the most part, and later the 
plant disappears. It does produce scanty fruit at times. It has 
occurred most abundantly on the shore of Massachusetts. 
6. L. AGARDHII Kjellman. As was stated under the preceding 
species, Z. Agardhii differs from Z. saccharina in no other respect 
than the absence of mucilage ducts in the blade. In variety of habit 
and manner of growth, the two species are identical, but it seems 
best to consider them as distinct, pending further investigations on 
the forms of our coast. The distribution of these two species is 
peculiar on the New England coast. J. saccharina, in its various 
forms, has been found only to the north of Cape Cod, while the 
abundant plants of Laminarie of the Simplices section found to the 
south of the Cape, are all Z. AgardAz. ‘The latter species, however, 
does occur, though sparingly, to the north of Cape Cod, also. 
More extended search, with this point in view, may cause these state- 
ments to be modified. The forms of Z. Agardhii are very similar to 
those of Z. saccharina, except that no plants of the habit of Z. saccha- 
rina, f. caperata have yet been found. 
f. NORMALIS Setchell. The ordinary form of Z. Agardhii presents 
the same variations as those described above for Z. saccharina 
f. normalis. 
f. VITTATA Setchell. Plants occur quite commonly on the south- 
ern shores of New England which resemble very closely plants of 
L. saccharina f. Phyllitis, but without mucilage ducts in the blade. 
They are in the most characteristic form, however, very much more 
elongated than the plants of that form, and the elongated forms occur 
also on the coast of Maine. The most striking plants of this form 
are those collected at Fox Island, Hunnewell’s Point, Maine, by F. S. 
Collins, and a considerable number which were found growing on the 
piles of Ocean Pier, Watch Hill, R. L, by the writer. The stipe is 
short, from 2—3 centimeters in length, the base of the blade is elongated 
cuneate, and the blade is long and narrow, averaging from 30—65 
centimeters in length and from 1-2 centimeters in width. The nar- 
row plants may be regarded as the type of the f. v///a/a, but some- 
what broader forms also occur, very similar in habit to the older 
forms of Z. saccharina f. Phyllitis. 
