Origin of Species Variorum

→ though 1859 1860 1861 1866 1869

in allied though distinct species, though 1872

→ relation 1859 1860 1861 1866

a greater or less degree in relation 1869 1872

→ through the principle of modifications being 1859 1860 1861 1866

with their modifications 1869 1872

→ corresponding 1859 1860 1861 1866

a corresponding 1869

a corresponding early 1872

→ selection, 1859 1860 1861 1866

through natural selection, 1869 1872

→ and their final abortion, present to us no inexplicable difficulties; on the contrary, their presence might 1859 1860 1861

and their final abortion, present to us no inexplicable difficulties; on the contrary, their pre- sence might 1866

might even 1869 1872

→ have been even 1859 1860 1861

even have been 1866

have been 1869 1872

→ an arrangement is only so far natural as it is 1859 1860 1861 1866

a natural arrangement must be 1869 1872

→ of organic beings, 1859 1860 1861 1866

OMIT 1869 1872

organs

organs,

→though fitted in the adult

state

members

for

habits

purposes

as different as

is possible.

possible.

Larvæ are active embryos, which have

been

become

specially modified in →relation to their habits of life, →through the principle of modifications being inherited at →corresponding

age.

ages.

these

this

same

principles,—

principle—

and bearing in mind, that when organs are reduced in size, either from disuse or →selection, it will generally be at that period of life when the being has to provide for its own wants, and bearing in mind how strong is the

force

principle

of inheritance— the occurrence of rudimentary organs →and their final abortion, present to us no inexplicable difficulties; on the contrary, their presence might →have been even anticipated. The importance of embryological characters and of rudimentary organs in classification is intelligible, on the view that →an arrangement is only so far natural as it is genealogical.

Finally, the several classes of facts which have been considered in this chapter, seem to me to proclaim so plainly, that the

innumerable

inumerable

species,

genera

genera,

and

families,

families

→of organic beings, with which this world is peopled,

are

have

all descended, each within its own class or group, from common parents, and have all been modified in the course of descent, that I should without hesitation adopt this view, even if it were unsupported by

any other

other

facts or arguments.