[262] All these animals, on the contrary, have seven vertebræ.
[263] This is not the fact. The spinal marrow, even, may be wounded, without death being the immediate result.
[264] Snow-water, we know, is apt to produce goitre.
[265] “Stomachus.” More properly, the œsophagus, or ventricle.
[266] Lacunæ modo.
[267] Or turtle. It has a tongue, and though it has no teeth, the jaws are edged with a horny substance like the bills of birds.
[268] “Crenis” is read for “renis:” otherwise the passage is unintelligible: it is still most probably in a corrupt state.
[269] Among all the mammiferæ and the birds, the heart has four cavities, two on each side.
[270] Mens.
[271] This is a mistake. The heart is subject to disease, equally with other parts of the body.