Origin of Species Variorum

→ OMIT 1869 1872

to the individual, 1859 1860 1861 1866

→ many cases of correlated variation, 1869 1872

there are very many other correlations of growth, 1859 1860 1861 1866

→ understand, undoubtedly occur. 1869 1872

understand. 1859 1860 1861 1866

→ standing higher in the scale, and which 1869 1872

which 1859 1860 1861 1866

→ are not regulated 1869 1872

will be disregarded 1859 1860 1861 1866

→ in that district and amongst these species, 1861 1866 1869 1872

there, on an average, 1859 1860

to have been

....

potent in their effects. Homologous parts tend to vary in the same

manner,

way,

and homologous parts tend to cohere. Modifications in hard parts and in external parts sometimes affect softer and internal parts. When one part is largely developed, perhaps it tends to draw nourishment from the adjoining parts; and every part of the structure which can be saved without detriment →OMIT will be saved. Changes of structure at an early age

will generally

will often

may

affect parts subsequently developed; and →many cases of correlated variation, the nature of which we are

utterly

....

unable to →understand, undoubtedly occur. Multiple parts are variable in number and in structure, perhaps arising from such parts not having been closely specialised

for

any particular function, so that their modifications have not been closely checked by natural selection. It

follows

probably from this same

cause

cause,

that organic beings low in the scale

of nature

....

are more variable than those →standing higher in the scale, and which have their whole organisation more

specialised,

and

are

higher

the

scale.

Rudimentary organs, from being useless, →are not regulated by natural selection, and hence

probably

....

are variable. Specific

characters—

characters —

that is, the characters which have come to differ since the several species of the same genus branched off from a common

parent—

parent —

are more variable than generic characters, or those which have long been inherited, and have not differed within this same period. In these remarks we have referred to special parts or organs being still variable, because they have recently varied and thus come to differ; but we have also seen in the second

Chapter

chapter

that the same principle applies to the whole individual; for in a district where many species of

any

genus are

found—

found —

that is, where there has been much former variation and differentiation, or where the manufactory of new specific forms has been actively at

work—

work —

→in that district and amongst these species, we