In Land-
Shells This Law Of Distribution Does Not Appear To Hold Good.
In My Very Small Collection Of Insects, Mr. Waterhouse
Remarks, That Of Those Which Were Ticketed With Their Locality,
Not One Was Common To Any Two Of The Islands.
If we now turn to the Flora, we shall find the aboriginal
plants of the different islands wonderfully different.
I give
all the following results on the high authority of my friend
Dr. J. Hooker. I may premise that I indiscriminately collected
everything in flower on the different islands, and fortunately
kept my collections separate. Too much confidence,
however, must not be placed in the proportional results, as
the small collections brought home by some other naturalists
though in some respects confirming the results, plainly show
that much remains to be done in the botany of this group:
the Leguminosae, moreover, has as yet been only approximately
worked out: -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Number of
Species
confined
to the
Number of Number of Galapagos
species species Number Archipelago
Total found in confined confined but found
Name Number other to the to the on more
of of parts of Galapagos one than the
Island Species the world Archipelago island one island
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
James 71 33 38 30 8
Albemarle 4 18 26 22 4
Chatham 32 16 16 12 4
Charles 68 39 29 21 8
(or 29, if
the probably
imported
plants be
subtracted.)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Hence we have the truly wonderful fact, that in James
Island, of the thirty-eight Galapageian plants, or those found
in no other part of the world, thirty are exclusively confined
to this one island; and in Albemarle Island, of the twenty-
six aboriginal Galapageian plants, twenty-two are confined
to this one island, that is, only four are at present known to
grow in the other islands of the archipelago; and so on, as
shown in the above table, with the plants from Chatham and
Charles Islands.
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