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1859
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1869
1872

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1859
1860
1861
1869
1872

since fully confirmed by Mr. Wallace's admirable researches, in 1866
in 1859 1860 1861
since greatly extended by Mr. Wallace's admirable researches, in 1869 1872

are situated on moderately deep 1859 1860 1861 1866
stand on a moderately shallow 1869 1872

closely allied or identical 1859 1860 1861 1866
the same or by very closely allied 1869
the same or by closely allied 1872

1 blocks not present in 1866 1869 1872; present in 1859 1860 1861
No doubt some few anomalies occur in this great archipelago, and there is much difficulty in forming a judgment in some cases owing to the probable naturalisation of certain mammals through man's agency; but we shall soon have much light thrown on the natural history of this archipelago by the admirable zeal and researches of Mr. Wallace.

We see Britain 1859 1860 1861 1866
For instance, Britain is 1869 1872

we meet with analogous facts on many islands separated by similar channels from 1859 1860 1861 1866
and so it is with all the islands near the shores of 1869 1872

stand on 1859 1860 1861 1866
on the other hand, stand on 1869 1872

in all cases depends to a certain degree 1859 1860 1861 1866
which animals of all kinds undergo, partly depends 1869 1872

during changes of level it is obvious that islands separated 1859 1860 1861 1866
islands separated 1869
the islands which are separated from each other or from the mainland 1872

by 1859 1860 1861 1866 1872
from each other or from the mainland by 1869

to the mainland than 1859 1860 1861 1866
than 1869
than the 1872

the frequent relation 1859 1860 1861 1866
how it is that a relation exists 1869 1872

and 1859 1860 1861 1866
separating two mammalian faunas, and 1869 1872

affinity of the mammalian inhabitants of islands with those of a neighbouring continent,— an inexplicable relation 1859 1860 1861 1866
their affinity,— a relation which is quite inexplicable 1869 1872

All the foregoing remarks on 1859 1860 1861 1866
The foregoing statements in regard to 1869 1872

richness in endemic forms in particular classes or sections of classes,— 1859 1860 1861 1866
species, with a large proportion consisting of endemic forms— the members of certain groups, and not of other groups in the same class, having been modified— 1869
species, with a large proportion consisting of endemic forms— the members of certain groups, but not those of other groups in the same class, having been modified— 1872

whole groups, 1859 1860 1861 1866
certain whole orders, 1869 1872

in both of the same mammiferous species or of allied species in a more or less modified condition. Mr. Windsor Earl has made some striking observations on this
head
head,
since fully confirmed by Mr. Wallace's admirable researches, in regard to the great Malay Archipelago, which is traversed near Celebes by a space of deep
ocean,
ocean;
and this
space
space
separates two widely distinct mammalian faunas. On either side the islands are situated on moderately deep submarine
bank,
banks,
and
these
these islands
they
are inhabited by closely allied or identical quadrupeds. I have not as yet had time to follow up this subject in all
other
other
quarters of the world; but as far as I have gone, the relation
generally
generally
holds good. We see Britain separated by a shallow channel from Europe, and the mammals are the same on both sides; we meet with analogous facts on many islands separated by similar channels from Australia. The West Indian
Islands,
Islands
stand on a deeply submerged bank, nearly 1000 fathoms in depth, and here we find American forms, but the species and even the genera are
quite distinct.
distinct.
As the amount of modification in all cases depends to a certain degree on the lapse of time, and as during changes of level it is obvious that islands separated by shallow
channels,
channels
are more likely to have been continuously united within a recent period to the mainland than islands separated by deeper channels, we can understand the frequent relation between the depth of the sea and the degree of affinity of the mammalian inhabitants of islands with those of a neighbouring continent,— an inexplicable relation on the
theory
view
of independent acts of creation.
All the foregoing remarks on the inhabitants of oceanic islands,— namely, the
fewness
scarcity
of
kinds—
kinds,—
kinds,—
the richness in endemic forms in particular classes or sections of classes,— the absence of whole groups, as of