Animals that are viviparous
externally and internally oviparous present an intermediate
arrangement; for the underneath portion of the womb, in which the eggs
are, is placed near to the loin, but the part about the orifice is
above the gut.)
Further, there is the following diversity observable in wombs as
compared with one another: namely that the females of horned
nonambidental animals are furnished with cotyledons in the womb when
they are pregnant, and such is the case, among ambidentals, with the
hare, the mouse, and the bat; whereas all other animals that are
ambidental, viviparous, and furnished with feet, have the womb quite
smooth, and in their case the attachment of the embryo is to the
womb itself and not to any cotyledon inside it.
The parts, then, in animals that are not homogeneous with
themselves and uniform in their texture, both parts external and parts
internal, have the properties above assigned to them.
2
In sanguineous animals the homogeneous or uniform part most
universally found is the blood, and its habitat the vein; next in
degree of universality, their analogues, lymph and fibre, and, that
which chiefly constitutes the frame of animals, flesh and whatsoever
in the several parts is analogous to flesh; then bone, and parts
that are analogous to bone, as fish-bone and gristle; and then, again,
skin, membrane, sinew, hair, nails, and whatever corresponds to these;
and, furthermore, fat, suet, and the excretions: and the excretions
are dung, phlegm, yellow bile, and black bile.
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