On the Genesis of SpeciesMivart, St. George Jackson
Religion
On the Genesis of Species
Mivart, St. George Jackson
Evolution (Biology)
(1.) But against this it may be said, in the first place, that the argument
proves too much; for, on this supposition, many species must have tended to
undergo a similar modification, and we ought to have at least several
forms, similar to the giraffe, developed from different Ungulata.[20] A
careful observer of animal life, who has long resided in South Africa,
explored the interior, and lived in the giraffe country, has assured the
Author that the giraffe has powers of locomotion and endurance fully equal
to those possessed by any of the other Ungulata of that continent. It would
seem, therefore, that some of these other Ungulates ought to have developed
in a similar manner as to the neck, under pain of being starved, when the
long neck of the giraffe was in its incipient stage.
To this criticism it has been objected that different kinds of animals are
preserved, in the struggle for life, in very different ways, and even {26}
that "high reaching" may be attained in more modes than one--as, for
example, by the trunk of the elephant. This is, indeed, true, but then none
of the African Ungulata[21] have, nor do they appear ever to have had, any
proboscis whatsoever; nor have they acquired such a development as to allow
them to rise on their hind limbs and graze on trees in a kangaroo-attitude,
nor a power of climbing, nor, as far as known, any other modification
tending to compensate for the comparative shortness of the neck. Again, it
may perhaps be said that leaf-eating forms are exceptional, and that
therefore the struggle to attain high branches would not affect many
Ungulates. But surely, when these severe droughts necessary for the theory
occur, the ground vegetation is supposed to be exhausted; and, indeed, the
giraffe is quite capable of feeding from off the ground. So that, in these
cases, the other Ungulata _must_ have taken to leaf eating or have starved,
and thus must have had any accidental long-necked varieties favoured and
preserved exactly as the long-necked varieties of the giraffe are supposed
to have been favoured and preserved.
Public-domain text, read in full here on John Shaqi.
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