Origin of Species Variorum

→ being closely related, though ranked as distinct species, 1869 1872

though ranked as distinct species, being closely related, 1859 1860 1861 1866

→ in any two 1866 1869 1872

two 1859 1860 1861

→ compared with Living Forms. 1869

Forms .— 1859 1860

compared with Living Forms. — 1861

compared with Living Forms. 1866

compared with Living Forms . 1872

consecutive formations, by the physical conditions of the ancient areas having remained nearly the same. Let it be remembered that the forms of life, at least those inhabiting the sea, have changed almost simultaneously throughout the world, and therefore under the most different climates and conditions. Consider the

pro- digious

prodigious

vicissitudes of climate during the pleistocene period, which includes the whole glacial

period,

epoch,

and note how little the specific forms of the inhabitants of the sea have been affected.

On the theory of descent, the full meaning of the

fact of

....

fossil remains from closely consecutive

formations,

formations

→being closely related, though ranked as distinct species, is obvious. As the accumulation of each formation has often been interrupted, and as long blank intervals have intervened between successive formations, we ought not to expect to find, as I attempted to show in the last chapter, in any one or →in any two

formations,

formations

all the intermediate varieties between the species which appeared at the commencement and close of these

periods;

periods:

but we ought to find after intervals, very long as measured by years, but only moderately long as measured geologically, closely allied forms, or, as they have been called by some authors, representative species; and these

we assuredly

assuredly we

do find. We find, in short, such evidence of the slow and scarcely sensible

mutations

mutation

of specific forms, as we have

a just

the

right to

expect

expect.