Origin of Species Variorum

→ it might have been thought 1861 1866 1869 1872

I should have expected 1859 1860

→ recently Sir J. 1866 1869

quite recently Mr. 1859 1860 1861

Sir J. 1872

→ will ever be found of an important part varying: 1866 1869

of an important part varying will ever be found: 1859 1860 1861

will ever be found of an important part varying; 1872

→ is 1861 1866 1869 1872

seems to me 1859 1860

→ about which hardly 1869

hardly 1859 1860 1861 1866

OMIT 1872

→ them as species or 1869

OMIT 1872

as species and which 1859 1860 1861 1866

↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872

With respect to many of these forms, hardly two naturalists agree whether to rank them as species or as varieties.

→ several genera of Brachiopod shells, and the Ruff (Machetes pugnax) amongst birds. 1866 1869

and several genera of Brachiopod shells. 1859 1860 1861

and of Brachiopod shells. 1872

→ are 1861 1866 1869 1872

seem to be 1859 1860

→ have at least in some of 1869

see in 1859 1860 1861 1866

see, at least in some of 1872

to the great central ganglion of an insect would have been variable in the same species; →it might have been thought that changes of this nature could have been effected only by slow

degrees:

degrees;

yet →recently Sir J. Lubbock has shown a degree of variability in these main nerves in Coccus, which may almost be compared to the irregular branching of the stem of a tree. This philosophical naturalist, I may add, has also

quite recently

~~recently~~

recently

shown that the muscles in the larvæ of certain insects are

very

....

far from uniform. Authors sometimes argue in a circle when they state that important organs never vary; for these same authors practically rank

that character

those parts

as important (as some few naturalists have honestly confessed) which

does

not vary; and, under this point of view, no instance →will ever be found of an important part varying: but under any other point of view many instances assuredly can be given.

There is one point connected with individual differences, which →is extremely perplexing: I refer to those genera which have

sometimes

....

been called "protean" or "polymorphic," in which the species present an inordinate amount of

variation.

variation;

~~and~~

and

→about which hardly

~~two~~

two

~~naturalists~~

naturalists

can

~~OMIT~~

....

~~agree~~

agree

~~whether~~

which forms

whether

~~rank~~

rank

→them as species or

~~varieties.~~

varieties.

↑ We may instance Rubus, Rosa, and Hieracium amongst plants, several genera of

insects

insects,

→several genera of Brachiopod shells, and the Ruff (Machetes pugnax) amongst birds. In most polymorphic genera some of the species have fixed and definite characters. Genera which are polymorphic in one country seem to be, with

some

few exceptions, polymorphic in other countries, and likewise, judging from Brachiopod shells, at former periods of time. These facts →are very perplexing, for they seem to show that this kind of variability is independent of the conditions of life. I am inclined to suspect that we →have at least in some of these polymorphic

genera,

genera

variations