148 l Rhodora [Jurv 
7. L. LONGICRURIS De la Pylaie. There is little to add to the 
general description of this species given by Harvey and by Farlow. 
It is one of the most striking and easily recognized of the species of 
Laminaria. It is common north of the Cape Cod region, growing in 
the tide pools of the lowermost littoral and in the upper sublittoral 
region. In some cases it may grow in the lower sublittoral and elit- 
toral regions. It reaches a greater size than any other species of 
Laminaria, being at times 1o—12 meters long and 1—1.5 meters wide. 
The stipe is long in proportion to the blade, with a distinct crook in 
the uppermost part, which is hollow, and abruptly constricted just 
below the transition place. South of Cape Cod it occurs at exposed 
points. The writer has found it growing on piles of wharves at 
Watch Hill, R. I., and at Ram Island, near Noank, Conn. It is also 
commonly washed ashore after storms at Watch Hill, R. I., and at 
New London, Conn. 
'The presence or absence of mucilage ducts in this species needs 
more careful investigation from the fresh material. Areschoug (1883, 
p. 8), Kjellman (1883, p. 233), Rosenvinge (1893, p. 846, 1894, p. 
91, 1898, p. 52), and Guignard (1892, p. 36), all assert that there 
are mucilage ducts in the stipe, at least in the lower part, and Rosen- 
vinge claims to have detected them even in the cortex of the hollow 
portion of the stipe. The writer has been unable to detect any muci- 
lage ducts in the stipe of this species, but does find, at times, a circle 
more or less complete, of the perithecia of a species of sphariaceous 
fungi, in the lower portion of the stipe of this and of Z. saccharina, 
which has the appearance of a circle of mucilage ducts. This fungus 
is mentioned by Farlow in his New England Algz (p. ro), and is of 
very common occurrence on the stipes of this species, It may be 
that this fungus, growing in such an unusual position, is the cause of 
the disagreement in regard to the stipe. The writer does not find 
mucilage ducts in the blade either; but this certainly needs more 
study with fresh and carefully fixed material. Z. /ongicruris, in 
spite of its large size, seems to be an annual plant. 
List or Wonks REFERRED TO. 
Areschoug, J. E., 1883. Observationes Phycologicz, Particula Quarta. 
(Acta Reg. Soc. Scient., ser. III, vol. x.) 
De la Pylaie, M., 1824. Quelques observations sur les productions 
de l'ile de Terre Neuve et sur quelques Algues de la cóte de 
France appartenant au genre Laminaire, (Ann. sci. nat. ser. I, 
tome 4.) 
De la Pylaie, M., 1829. Flore de Vile de Terre Neuve et des iles S. 
Pierre et Miclon. 
Farlow, W. G., 1881. Marine Algz of New England and adjacent 
coast. (Reprinted from the Report of the U. S. Fish Commis- 
sion for 1879.) 
