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256
car i. skottsberg
Desmarestia Harveyana (Pl. VII.) and anceps (Pl. VIII.) are the most
important species. At least the first seems to thrive everywhere. D.
Rossii has not been dredged by me, but has been observed at the
South Orkney Islands. Among the Phæophyceæ we further mark an
Urvillæa (?), 1—2 m. long, which is very common, especially on steep
walls in the upper sublittoral region and perhaps consists a peculiar
formation, and Lessonia simulans, of which I found specimens of 5,5 m.
length. Scythothalia Jacquinotii probably belongs to the sublittoral
region, though I only found it floating, not growing. One Sphacelaria
and Adeuocystis Lessonii also must be mentioned here; the latter is
möre common in littoral pools. I am sorry that I must quite leave out
a couple of species, of which only the recollection remains and the
systematic position of which is very doubtful. They were as far as I
could judge new species of great interest.
In the Desmarestia-formation grows a lot q>f Florideæ. This
collection is far from worked out, and I only give the following as a
preliminary list, which the future will certainly change and make more
complete: Ahnfeltia sp., Callithanmion sp., Callophyllis variegata,
Ce-ramium sp., Delesseria (Schisoneura) quercifolia, Dclisea pulchra,
Gracilaria (Leptosarca) simplex. Kallymenia (?) sp., Nitophyllum sp.,
Phyllo-phora sp., Plocamium Hookeri, Polysiphonia sp., Ptilota cfr. couflucns,
Rhodymenia sp., &ca, and Corallinaceæ on shells. Generally the algæ
were very pure, only Tew parasites were seen.
From Gepps’ and Holmes’s lists on South Orkney algæ may be
seen that a fine vegetation has been dredged in Scotia Bay at 9—10
fathoms: Acanthococcus spinuliger, Plocamium Hookeri, coccincum and
secundatum. Pteridium proliferum, Scyt/iotkamnus mgulosus, Cryptonemia
luxurious, Pctrocclis cruenta, Lithothamnium magellanicum, Lithophyllum
discoidcum and decipiens.
The elittoral region.
As I have mentioned above I include the occasional discoveries of
algæ, made at a greater depth than 40—50 m. under the elittoral flora,
just as Kjei.LMAN has done before. As I consider this question to be
of considerable interest and not fully worked out, I shall occupy
myself with it here a little.
Kjellman 1 writes: »Those few specimens of algæ which have
sometimes been brought up by the dredge from a greater depth than
1 Alg. Aret. Sea, p. 10—11.
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