Origin of Species Variorum

→ sedimentary formations in a recognisable condition 1866 1869 1872

formations 1859 1860 1861

→ and denuded condition. 1869 1872

condition. 1859 1860

but likewise denuded condition. 1861 1866

→ namely— that, though we find in our geological formations many 1866 1869 1872

namely our not finding in the successive formations infinitely numerous transitional 1859 1860

namely— that though we find in our geological formations many 1861

→ and which formerly existed, we do not find infinitely numerous fine transitional forms closely joining them all together;— 1869 1872

or have existed; 1859 1860

and have existed, 1861 1866

→ the 1859 1860 1869 1872

we do not find infinitely numerous fine transitional forms closely joining them all together;— the 1861 1866

→ rich in fossils beneath the Cambrian strata,— 1869 1872

beneath the Silurian strata, 1859 1860

beneath the Silurian strata,— 1861

rich in fossils beneath the Silurian strata,— 1866

→ OMIT 1861 1866 1869 1872

plainest manner by the 1859 1860

out; and clear and open oceans may have existed where our continents now stand. Nor should we be justified in assuming that if, for instance, the bed of the Pacific Ocean were now converted into a continent, we should there find →sedimentary formations in a recognisable condition older than the

silurian

Cambrian

Silurian

strata, supposing such to have been formerly deposited; for it might well happen that strata which had subsided some miles nearer to the centre of the earth, and which had been pressed on by an enormous weight of superincumbent water, might have undergone far more metamorphic action than strata which have always remained nearer to the surface. The immense areas in some parts of the world, for instance in South America, of

bare

naked

metamorphic rocks, which must have been heated under great pressure, have always seemed to me to require some special explanation; and we may perhaps believe that we see in these large areas, the many formations long anterior to the

silurian

Cambrian

Silurian

epoch in a completely metamorphosed →and denuded condition.

The several difficulties here discussed, →namely— that, though we find in our geological formations many links between the

many

....

species which now exist →and which formerly existed, we do not find infinitely numerous fine transitional forms closely joining them all together;— →the sudden manner in which

whole

several

several whole

groups of species

appear

first appeared

first appear

in our European

formations;

formations;—

the almost entire absence, as at present known, of

fossiliferous