92 
L AMIN AR I ACE iE . — Laminaria. 
iv. 
3. Laminaria dermatodea , Dela Pyl. ; stipes rising from a branching root, terete 
below, compressed or flattened above, dilating into a cuneate-oblong simple frond 
afterwards becoming cordate at base, and palmately cleft from the apex. J. Aq. 
Sp. Alg. 1 , p. 131. Pliyllitis dermatodea , Kiitz. Sp. Alg. p. 567. 
Hab. On rocks, at and below low-water mark. Newfoundland, Be la Pylceie. 
(v. s. in Herb. T.C.D.) 
Stipe 3-4 inches long, in the young plant compressed, in the full-grown altogether 
flat, passing into the base of an oblong or lanceolate frond, which in the young 
plant is entire, but which at last, becoming more dilated and with a more cordate 
base, is cloven into several segments and assumes the habit of L. digitata. 
I have seen only young specimens of this species, and in them the apex is imperfect. 
They were collected by Despreaux and communicated to me by M. Lenormand. 
4. Laminaria saccliarina , Lamour. ; stem cylindrical, solid, short, expanding into 
a cartilaginous or submembranaceous, lanceolate or oblong, undivided frond. J. 
Ag. Sp. Alg. vol. 1, p. 132. Kiitz. Sp. Alg. p. 574. Harv. Pliyc. Brit. t. 289. 
Fucus saccharmus, L. E. Pot. t. 1376. Turn. Hist. t. 163. Lara. Lamour ouxii ? 
Borp, Diet. Cl. Hist. Hat. 9, p- 189- 
LIab. On rocks in the sea, from low- water mark to four or five fathoms. Com- 
mon on rocky shores, from Greenland to New York ; and cast up from deeper 
water on the New Jersey coast. (Its southern limit not ascertained beyond Long- 
branch, N. J.). (v. v.) 
Boot of several branching fibres, forming a conical holdfast. Stem from a few 
inches to a foot or more in length, from a quarter to half an inch in diameter, 
terete, compressed at its upper end, and gradually dilating into the base of the 
terminal, undivided lamina. I^amina very variable in its proportionate length and 
breadth, sometimes linear-lanceolate, sometimes ovato-lanceolate, sometimes elliptical, 
acute or obtuse, or drawn out at the apex into a long caudate prolongation, from 
one to six or ten feet in length, and from one to twelve inches in breadth, flat, or 
very much curled at the margin, and at length over the whole surface ; sometimes 
regularly transversely wrinkled through the middle of the lamina, sometimes irre- 
gularly bullated. Substance in some varieties membranous, in others cartilaginous 
or leathery, or even horny in some. Colour of the leaf when young a greenish 
olive, browner as it grows old. 
Numerous varieties, which perhaps demand future study, occur on the American 
coast. The Laminaria Lamourouxii of Bory, which has been sent me from Boston 
Harbour by Prof. Asa Gray, and of which I also possess an authentic specimen from 
Newfoundland, looks almost like a species, with its thickish, broadly elliptical, 
scarcely waved frond, and its slightly branching root ; but I am not sufficiently 
