Origin of Species Variorum

→ which 1861

in the two kinds of clover, which 1866 1869 1872

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

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 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 the petals, 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 should be induced to suck its flowers.

→ OMIT 1861

I have found by experiment that 1859 1860

→ as previously stated, 1861

greatly 1859

OMIT 1860

→ moving the petals, 1861

visiting and moving parts of the corolla, 1859 1860

→ in the most perfect manner 1859 1860 1861 1866

OMIT 1869 1872

→ continued 1859 1860 1861 1866

most perfect manner, by the continued 1869 1872

→ individuals presenting mutual and slightly favourable 1859 1860 1861

individuals presenting slight 1866

all the individuals which presented slight 1869 1872

→ structure. 1859 1860 1861

structure mutually favourable to each other. 1866 1869 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

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

in the length of the corolla →which determines the visits of the

hive-bee,

hive-bee

must be very trifling; for I have been

assured

informed,

that when

~~the~~

the

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

~~abundantly~~

abundantly

visited by

many hive-bees.

hive-bees.

↑ Thus it might be a great advantage to the hive-bee to have a slightly longer or differently constructed proboscis. On the other hand, →OMIT the fertility of

clover

clover,

→as previously stated, depends on bees →moving the petals, 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. Thus I can understand how a flower and a bee might slowly become, either simultaneously or one after the other, modified and adapted →in the most perfect manner to each

other

other,

the →continued preservation of →individuals presenting mutual and slightly favourable deviations of →structure.

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 →action, for instance, of the coast-waves, called a trifling and insignificant cause, when applied to the excavation of

the deepest

gigantic

valleys or

the formation of

long

the longest

lines of inland cliffs. Natural selection

~~can~~

can

acts

act

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 single diluvial wave, so will natural