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REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 95
glands, passing abruptly into a broadly ovate or cordate lamina, which splits up into
a few broad segments; substance thick, color blackish.
Deep water.
Peak’s Island, Maine; Gloucester, Mass.
Distinguished from the last by its short, thick stipe, which is furnished with muciparous glands, and
which terminates abruptly in a broad, thick lamina, which is usually decidedly cordate at the base. It is
an inhabitant of deep water, and is occasionally found washed ashore in the autumn, but is always
much less common than the last species. Le Jolis considers that L. platymeris is, at least in part, the
same as his L. flexicaulis; but what seems to us to be the true L. platymeris differs from L. flexicaulis in
having muciparous glands in the stipe, a peculiarity which, according to Le Jolis, is found in L.
Cloustoni, but not in L. flexicaulis.
SACCORHIZA, De la Pyl.
(From σακκος [sakkos], a sack, and ριζα [riza], a root.)
Fronds attached at first by a disk-like base, from which are given off later a few
short root-like fibers; stipe compressed, plane, gradually passing into a ribless
lamina; cryptostomata scattered on both sides of the frond; fruit as in Laminaria.
A genus differing from Laminaria principally in the form of the basal attachment and in the presence
of cryptostomata on both surfaces of the frond. The typical species, S. bulbosa, not found on our coast, is
attached by a sack-like base, and the fruit is borne on the marginal upper portion of the stipe. In the
present genus were at one time included all the Laminariæ whose attachment is discoidal rather than
by branching root-like fibers. There are, however, forms still retained in the genus Laminaria, as L.
solidungula, in which the base is a disk, and our own species S. dermatodea, although in its younger
stages attached by a disk, soon has a series of short fibers, which, as the plant increases in size, become
branched. The cryptostomata are small pits sunk in the surface of the frond, from which arise groups of
hairs, as in the Fucaceæ. They are visible to the naked eye in the young plants, but disappear with age.
S. DERMATODEA, De la Pyl. (Laminaria dermatodea, De la Pyl., Ann. Sciences, l. c.,
Pl. 9 g, non Agardh nec Harvey.—L. lorea, Ag. Spec.; Harvey, in Ner. Am. Bor.)
Exs.—Algæ Am. Bor., Farlow, Anderson & Eaton, No. 120.
Fronds usually gregarious, base at first discoidal, afterwards with a whorl of short,
thick, usually simple fibers; stipe six inches to two feet long, compressed, gradually
expanding into a thick, coriaceous-lanceolate or lance-ovate lamina, one to six feet
long, six to eighteen inches wide, at first entire, but afterwards torn above into
several segments; fruit in scattered sori, which become confluent at the base of the
frond; paraphyses narrowly club-shaped, about .15 mm long; sporangia .12 mm long by
.02 mm broad.
From Marblehead, Mass., northward.
A characteristic species of the North Atlantic. Its southernmost limit is Marblehead, where only one
specimen has been collected. It is less rare at Gloucester, and is rather