Origin of Species Variorum

→ and which freely crosses with 1866 1869

of 1872

→ is 1866 1869

and which freely crosses with it, is 1872

↑ 3 blocks not present in 1866 1869 1872; present in 1859 1860 1861

Thus it might be a great advantage to the hive-bee to have a slightly longer or differently constructed proboscis. On the other hand, I have found by experiment that the fertility of clover greatly depends on bees visiting and moving parts of the corolla, so as to push the pollen on to the stigmatic surface. Hence, again, if humble-bees were to become rare in any country, it might be a great advantage to the red clover to have a shorter or more deeply divided tube to its corolla, so that the hive-bee could visit its flowers.

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

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

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 →and which freely crosses with the common hive-bee, →is able to reach and suck the nectar of the

~~common~~

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

enabled

induced

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 still at work, spoken of as trifling or insignificant, when applied to 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 banished such views as the excavation of a great valley by a