Origin of Species Variorum

→ than others; and thus the communities to which they belonged would flourish and throw off many swarms inheriting the same peculiarities. 1869 1872

and so have a better chance of living and leaving descendants. 1859 1860 1861 1866

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

Its descendants would probably inherit a tendency to a similar slight deviation of structure.

→ offer in vain 1859 1860 1861 1866 1872

in vain offer 1869

→ OMIT 1869 1872

which had been bitten 1866

→ in the two kinds of clover, which 1866 1869 1872

which 1861

→ of 1872

and which freely crosses with 1866 1869

→ and which freely crosses with it, is 1872

is 1866 1869

→ OMIT 1869 1872

in the most perfect manner 1859 1860 1861 1866

→ most perfect manner, by the continued 1869 1872

continued 1859 1860 1861 1866

→ all the individuals which presented slight 1869 1872

individuals presenting mutual and slightly favourable 1859 1860 1861

individuals presenting slight 1866

→ structure mutually favourable to each other. 1866 1869 1872

structure. 1859 1860 1861

→ agencies which we see still at work, spoken of as trifling or insignificant, when used in explaining 1872

action, for instance, of the coast-waves, called a trifling and insignificant cause, when applied to 1859 1860 1861

action, for instance, of the coast-waves, called at trifling and insignificant cause, when applied to 1866

agencies still at work, spoken of as trifling or insignificant, when applied to 1869

certain

individual

individuals

so characterised

....

would be able to obtain

its

their

food more

quickly,

quickly

→than others; and thus the communities to which they belonged would flourish and throw off many swarms inheriting the same peculiarities. ↑ The tubes of the

corollas

corolla

of the common red and incarnate clovers (Trifolium pratense and incarnatum) do not on a hasty glance appear to differ in length; yet the hive-bee can easily suck the nectar out of the incarnate clover, but not out of the common red clover, which is visited by humble-bees alone; so that whole fields of the red clover →offer in vain an abundant supply of precious nectar to the hive-bee. That this nectar is much liked by the hive-bee is certain; for I have repeatedly seen, but only in the autumn, many hive-bees sucking the flowers through holes

bitten in

the base of the tube →OMIT by humble-bees. The

differ- ence

difference

in the length of the corolla →in the two kinds of clover, which determines the visits of the

hive-bee

hive-bee,

must be very trifling; for I have been

informed,

assured

that when

the

....

red clover has been mown, the flowers of the second crop are somewhat smaller, and that these are

abundantly

....

visited by

hive-bees.

many hive-bees.

I do not know whether this statement is accurate; nor whether another published statement can be trusted, namely, that the Ligurian bee, which is generally considered a mere variety →of the common hive-bee, →and which freely crosses with it, is able to reach and suck the nectar of the

common

....

red clover. Thus, in a country where this kind of clover abounded, it might be a great advantage to the hive-bee to have a slightly longer or differently constructed proboscis. On the other hand, as the fertility of this clover absolutely depends on bees

moving

visiting

the

petals,

flowers,

if humble-bees were to become rare in any country, it might be a great advantage to the plant to have a shorter or more deeply divided corolla, so that

hive-bees

the hive-bees

should be

induced

enabled

to suck its flowers. Thus I can understand how a flower and a bee might slowly become, either simultaneously or one after the other, modified and adapted →OMIT to each

other,

other

the →most perfect manner, by the continued preservation of →all the individuals which presented slight deviations of →structure mutually favourable to each other.

I am well aware that this doctrine of natural selection, exemplified in the above imaginary instances, is open to the same objections which were

....

first urged against Sir Charles Lyell's noble views on "the modern changes of the earth, as illustrative of geology;" but we now

very

....

seldom hear the →agencies which we see still at work, spoken of as trifling or insignificant, when used in explaining the excavation of

gigantic

the deepest

valleys or

....

the formation of

the longest

long

lines of inland cliffs. Natural selection

can

....

act

acts

only by the preservation and accumulation of

infinitesimally

....

small inherited modifications, each profitable to the preserved being; and as modern geology has almost