myself still more, referring only to certain matters
affecting externally visible peculiarities. The trunk of the
elephant differs somewhat from other nasal prolongations, such as
the snouts of certain insectivora, which are simply development of
the nasal cartilages. The nasal cartilages in the Proboscidea serve
merely as valves to the entrance of the bony nares, the trunk itself
being only a pipe or duct leading to them, composed of powerful
muscular and membranous tissue and consisting of two tubes,
separated by a septum. The muscles in front (_levatores
proboscidis_), starting from the frontal bone, run along a
semicircular line, arching upwards above the nasal bones and between
the orbits. They are met at the sides by the lateral longitudinal
muscles, which blend, and their fibres run the whole length of the
proboscis down to the extremity. The depressing muscles
(_depressores proboscidis_), or posterior longitudinals, arise from
the anterior surface and lower border of the premaxillaries, and form
"two layers of oblique fasciculi along the posterior surface of the
proboscis; the fibres of the superficial set are directed downwards
and outwards from the middle line. They do not reach the extremity
of the trunk, but disappear by curving over the sides a little above
the end of the organ. The fibres of the deeper set take the reverse
direction, and are attached to a distinct tendinous raphe along the
posterior median line" ('Anat. Ind. Elep.,' Miall and Greenwood).
These muscles form the outer sheath of other muscles, which radiate
from the nasal canals outwards, and which consist of numerous
distinct fasciculi. Then there are a set of transverse muscles in
two parts--one narrow, forming the septum or partition between the
nasal passages, and the other broader between the narrow part and
the posterior longitudinal muscles.
When we consider the bulk of these well-knit muscles we can no longer
wonder at the power of which this organ is capable, although,
according to Mr. Sanderson, its capabilities are much exaggerated;
and he explodes various popular delusions concerning it. He doubts
the possibility of the animal picking up a needle, the common old
story which I also disbelieve, having often seen the difficulty with
which a coin is picked up, or rather scraped up; but he quite scouts
the idea of an elephant being able to lift a heavy weight with his
trunk, giving an instance recorded of one of these creatures lifti
|