Further, fat and suet differ as to their localities: for
fat is found between the skin and flesh, but suet is found only at the
limit of the fleshy parts. Also, in animals supplied with fat the
omentum or caul is supplied with fat, and it is supplied with suet
in animals supplied with suet. Moreover, ambidental animals are
supplied with fat, and non-ambidentals with suet.
Of the viscera the liver in some animals becomes fatty, as,
among fishes, is the case with the selachia, by the melting of whose
livers an oil is manufactured. These cartilaginous fish themselves
have no free fat at all in connexion with the flesh or with the
stomach. The suet in fish is fatty, and does not solidify or
congeal. All animals are furnished with fat, either intermingled
with their flesh, or apart. Such as have no free or separate fat are
less fat than others in stomach and omentum, as the eel; for it has
only a scanty supply of suet about the omentum. Most animals take on
fat in the belly, especially such animals as are little in motion.
The brains of animals supplied with fat are oily, as in the pig;
of animals supplied with suet, parched and dry. But it is about the
kidneys more than any other viscera that animals are inclined to
take on fat; and the right kidney is always less supplied with fat
than the left kidney, and, be the two kidneys ever so fat, there is
always a space devoid of fat in between the two.
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