shells of Foraminifera,
Heteropods, and Pteropods, did not show the slightest trace of alumina, and
none has as yet been discovered in coral skeletons. It is most probable
that a large part of the clayey matter found in red clay and the red earth
of Bermuda is derived from the disintegration of pumice, which is
continually found floating on the surface of the sea. [See Murray, "On the
Distribution of Volcanic Debris Over the Floor of the Ocean;" _Proc. Roy.
Soc. Edin._ Vol. IX. pp. 247-261. 1876-1877.] The naturalists of the
_Challenger_ found it among the floating masses of gulf weed, and it is
frequently picked up on the reefs of Bermuda and other coral islands. The
red earth contains a good many fragments of magnetite, augite, felspar, and
glassy fragments, and when a large quantity of the rock of Bermuda is
dissolved away with acid, a small number of fragments are also met with.
These mineral particles most probably came originally from the pumice which
had been cast up on the island for long ages (for it is known that these
minerals are present in pumice), although possibly some of them may have
come from the volcanic rock, which is believed to form the nucleus of the
island." _The Voyage of H.M.S. Challenger_, Narrative of the Cruise, Vol.
I. 1885, pp. 141-142.

[108] Four bats occur rarely, two being N. American, and two West Indian
Species. _The Bermuda Islands_, by Angelo Heilprin, Philadelphia, 1889.

[109] Fourteen species of Spiders were collected by Prof. A. Heilprin, all
American or cosmopolitan species except one, _Lycosa atlantica_, which Dr.
Marx of Washington describes as new and as peculiar to the islands.
(Heilprin's _The Bermudas_, p. 93.)

[110] Mr. Theo. D. A. Cockerell informs me that there are two slugs in
Bermuda of which specimens exist in the British Museum,--_Amalia gagates_
Drap. common in Europe, and _Agriolimax campestris_ of the United States.
Both may therefore have been introduced by human agency. Also _Vaginulus
Morelete var. schivelyae_ which seems to be a variety of a Mexican species;
perhaps imported.

[111] "Notes on the Vegetation of Bermuda," by H. N. Moseley. (_Journal of
the Linnean Society_, Vol. XIV., _Botany_, p. 317.)

[112] _Gigantic Land Tortoises Living and Extinct in the Collection of the
British Museum._ By A. C. L. G. Guenther, F.R.S. 1877.

[113] The following list of the beetles yet known from the Galapagos shows
their scanty proportions and accidental charac