I may add that Scoresby remarks that green
water abounding with pelagic animals is invariably found
in a certain part of the Arctic Sea.
[1] I state this on the authority of Dr. E. Dieffenbach, in his
German translation of the first edition of this Journal.
[2] The Cape de Verd Islands were discovered in 1449. There was
a tombstone of a bishop with the date of 1571; and a crest of a
hand and dagger, dated 1497.
[3] I must take this opportunity of acknowledging the great
kindness with which this illustrious naturalist has examined
many of my specimens. I have sent (June, 1845) a full account
of the falling of this dust to the Geological Society.
[4] So named according to Patrick Symes's nomenclature.
[5] See Encyclop. of Anat. and Physiol., article Cephalopoda
[6] Mr. Horner and Sir David Brewster have described
(Philosophical Transactions, 1836, p. 65) a singular
"artificial substance resembling shell." It is deposited in
fine, transparent, highly polished, brown-coloured laminae,
possessing peculiar optical properties, on the inside of a
vessel, in which cloth, first prepared with glue and then
with lime, is made to revolve rapidly in water. It is much
softer, more transparent, and contains more animal matter,
than the natural incrustation at Ascension; but we here
again see the strong tendency which carbonate of lime and
animal matter evince to form a solid substance allied to
shell.
