The Natural History of Pliny, Volume 3 (of 6)

Chapter 83: CHAP. 81.—THE KIDNEYS: ANIMALS WHICH HAVE FOUR KIDNEYS. ANIMALS WHICH HAVE NONE.

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The work assembles systematic observations on animals, insects, and trees, combining natural history with practical notes. It surveys insect forms and habits, including bees, silk‑producing worms, spiders, and parasitic species, and discusses reproduction, classification, diseases, and useful products like honey and silk. It then examines animal anatomy in detail, limb by limb and organ by organ, comparing organs, vital functions, and bodily peculiarities across species. Later sections catalogue trees and exotic plants, describing aromatic gums, spices, frankincense, myrrh, and methods for producing and testing unguents and perfumes, and noting their uses and regions of origin.

CHAP. 81.—THE KIDNEYS: ANIMALS WHICH HAVE FOUR KIDNEYS. ANIMALS WHICH HAVE NONE.

About Briletum and Tharne 302 the stags have four kidneys: while, on the other hand, those animals which have wings and scales have 303 none. The kidneys adhere to the upper part of the loins. Among all animals, the kidney on the right side is more elevated than the other, less fat, and drier. In both kidneys there is a certain streak of fat running from the middle, with the sole exception of those of the sea-calf. It is above the kidneys, also, that animals are fattest, and the accumulation of fat about them is often the cause of death in sheep. Small stones are sometimes found in the kidneys. All quadrupeds that are viviparous have kidneys, but of those which are oviparous the tortoise is the only one that has them; an animal which has all the other viscera, but, like man, has the kidneys composed, to all appearance, of several kidneys, similar to those of the ox.