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NOTES ON RANGE IX DEPTH OF MABINE ALG^. 151
' Silliraan's Journal,' Count Pourtales states that Centroceras clavulatum
came up in a dredge which had been at the bottom in 270 fathoms ;
this species is stated in ' Nereis Americana ' as abundant at Key West,
everj'where near low-water mark. I doubt very much whether this
plant was brought from the bottom ; most likely it was caught by the
dredge in its progress towards the surface. In Areschoug's ' Phyceae
Scandinavicse Marinae,' it is stated that Desmarestia aculeata has been
got, between Jutland and Norway, at a depth of 90 fathoms.
In the supplement to Captain Inglefield's ' Summer Search for Sir
John Franklin ' (1853), there are some cases which were recorded by
myself in the Botanical Supplement to the work. They were given on
the authority of Dr. P. Sutherland, from whom I received the speci-
mens, viz. :
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