Origin of Species Variorum

→ in their present state, but 1866

but 1859 1860 1861

as they now exist, but 1869 1872

→ and simpler element. 1866 1869 1872

element. 1859 1860 1861

→ such modifications having actually 1866

a modification of this nature having 1859 1860 1861

this having 1869 1872

→ On my view these terms 1859 1860 1861 1866

According to the views here maintained, such language 1869 1872

→ during a long course of descent 1859 1860 1861 1866

OMIT 1869 1872

→ though simple legs, is 1866

legs, or from some simple appendage, is 1859 1860 1861

though extremely simple legs, is 1869

though extremely simple legs, is in part 1872

→ departments 1866

subjects in the whole round 1869 1872

→ Herein are included the ordinary 1866

The 1872

→ familiar. 1866

familiar, are generally effected abruptly by a few stages; but the transformations are in reality numerous and gradual, though concealed. 1872

→ These 1866

The metamorphoses of insects, with which every one is familiar, 1869

→ and in a concealed manner; 1866

OMIT 1869

→ graduated. 1866

gradual, though concealed. 1869

→ For instance, Sir J. Lubbock has recently shown that a 1866

A 1869 1872

→ above 1866

as shown by Sir J. Lubbock, above 1869 1872

→ in such 1866

and in this 1869 1872

Naturalists frequently speak of the skull as formed of metamorphosed

vertebræ;

vertebræ:

the jaws of crabs as metamorphosed legs; the stamens and pistils

flowers as metamorphosed leaves; but it would in

most

these

cases

~~probably~~

probably

be more correct, as Professor Huxley has remarked, to speak of both skull and vertebræ,

~~both~~

both

jaws and legs,

&c.,—

&c.,

as having been metamorphosed, not one from the

other,

other

→in their present state, but from some common →and simpler element.

Naturalists,

Most naturalists,

however, use such language only in a metaphorical

sense;

sense:

they are far from meaning that during a long course of descent, primordial organs of any kind— vertebræ in the one case and legs in the other— have actually been

converted

modified

into skulls or jaws. Yet so strong is the appearance of →such modifications having actually occurred, that naturalists can hardly avoid employing language having this plain signification. →On my view these terms may be used literally; and the wonderful fact of the jaws, for instance, of a crab retaining numerous characters, which they

would probably

probably would

have retained through inheritance, if they had really been metamorphosed →during a long course of descent from true →though simple legs, is explained.

Development

Embryology

and

Embryology .

Embryology.

Development .

This is one of the most important →departments of natural history. →Herein are included the ordinary metamorphoses of insects, with which every one is →familiar. →These are generally effected

~~somewhat~~

somewhat

abruptly by a few

stages;

stages

→and in a concealed manner; but the transformations are in reality numerous and →graduated. →For instance, Sir J. Lubbock has recently shown that a certain ephemerous insect (Chlöeon) during its

development,

development

moults,

moults

→above twenty times, and each time undergoes a certain amount of change; →in such

case

cases