Order VII, 
ALGiE. 
927 
2325. Laminaria. Root fibrous. Stipes dilated into a plane frond. Fructification, naked granules im.-nersed 
and forming irregular groups in the frond. 
2326. Lichina. Fronds minute, tufted, greenish-black when growing. Fructification solitary tubercles 
with a pore, at length scuteliiform. 
2327. Furcellaria. Frond cylindrical. Fructification concealed in the swollen extremities of the frond, 
capsules in the centre, and pyriforme granules in the circumference. 
2228. Fucus. Root scutate. I'rond plane or compressed, (rarely filiform) dichotomous. Fructification, 
tubercles contained in a common mucose receptacle, and filled with sporules and filaments. 
2329. Cystoseira. Root scutate. Stipes cylindrical. Lower leaves plane, upper ones filiform, furnished with 
pinnate vescicles. Fructification, tubercles in common receptacles, the receptacles with several loculaments. 
DIATOME^. 
15021 Articulations with one dot, Stem long 
15022 Filaments striated. Articulations nearly equal in diameter with parallel strise 
15023 Articulations half as long again as wide granular transversely 
15024 Filaments greenish, Articulations square striated 
15025 Filaments arcuate transversely striated. Articulations nearly square v. ith pellucid joints 
15026 Articulations half as long again as wide oblique marked with a pellucid transverse band and a dot 
15027 Filaments tapering very rigid with parallel transverse dense strife 
15028 Filaments tapering orange-colored. Articulations twice as short as their diameter 
15029 Filaments unequal containing nearly circular moniliform globules in rows 
15030 Joints contract. Articulations transversely striat. with 1 or 2 very fine lines about 3 times as long as wide 
15031 Articulations shorter than broad finally changed into somewhat oval close moniliform heaps 
15032 Filaments after copulation pinnatifid traversed by a longitudinal green streak. Articulations 2-toothed 
15033 Filaments somewhat branched ceespitose acute, Granules parallel clustered 
15034 Filam. somew. branched csespitose acute. Granules clustered appressed, Membrane of filam. inconspicuous 
15035 Filaments densely branched virgate. Granules elliptical 
15036 Filaments minute continuous erect branched containing cylindrical oblong scattered granules 
15037 Filaments slender erect dichotomous. Branches swollen here and there into roundish knobs : interior 
gelatinous with numerous cylindrical oblong granules 
NOSTOCHIN^. 
15038 Frond thick angular-lobed. Granules elliptical 
15039 Fronds aggregate minute globose, Granules globose 
15040 Frond deformed rugose, Granules globose brown 
and Miscellaneous Particulars. 
2265. Palmella. Apparently a diminutive of Palma, a little palm ; but the application of the name is not 
obvious in that sense. The plants are found in marshy or inundated places, and consist of globules nestling in 
a gelatine ; in which respect the genus differs from Protococcus, the Red Snow plant. It is supposed that 
many of the species are only the ova of animalcules. 
The Red Snow plant, which, as we have just said, is nearly related to this genus, has not hitherto been 
noticed in this country, but as it has been found in many countries similar to our own regions of snow, it is so 
probable that it exists in Great Britain, that we insert some particulars of it here, especially as it may be con- 
sidered to have been introduced at least in 1819, by Captain Ross's expedition to the North Pole. When viewed 
under the highest powers of a simple microscope, it appears to consist of globules containing a red fluid. We 
select the following observations upon its history, from a communication made to the News of Literature and 
Science, on the twenty-first of January, 1826. 
" Our scientific readers will remember the interest which was excited on the subject of this natural produc- 
tion, upon the return of Captain Ross from his Polar expedition, some years since. At that time it was 
examined by three of the most acute observers in this country, especially of microscopical objects, Wollaston, 
Brown, and Bauer, who all formed a similar conclusion in one respect, that it was of vegetable origin, but were 
of different opinions as to its precise nature : Dr. Wollaston supposing it to be the seed of a moss ; Mr. Brown, 
a substance belonging to Algas, and nearly related to Tremella cruenta, a common British plant j and Mr. 
