Copy 1, Volume 1
Lectures on comparative anatomy / Translated from the French ... by William Ross; under the inspection of James Macartney.
- Georges Cuvier
- Date:
- 1802
Licence: Public Domain Mark
Credit: Lectures on comparative anatomy / Translated from the French ... by William Ross; under the inspection of James Macartney. Source: Wellcome Collection.
551/604 page 507
![oflified, ‘productions, which extend from 1e) xiphoid cartilage nearly to the pelvis, The legs of mammiferous quadrupeds. move forward anid backward in planes nearly parallel. to the fpine, and not far diftant from the middle: plane of the body upon which the weight, operates.. In oviparous quadrupeds, on the contrary, the thighs are directed outward, and . the inflexions of the limbs take place in planes perpendicular to the fpine. In the latter cafe, then, the weight of. the body acts with a much longer lever in oppofing the extenfion of the knee. Thefe animals, therefore, have the knees always bent, and the belly dragging on the ground between their legs. On this account | they have received the name af reptiles, RACE tt . op | Of Walking. Ar the progreffive motions ty which man and ‘the inferior animals remove their bodies from. one place to another, require that a determinate — velocity fhou]d be communicated, in a particu- lar direction, to theircentres of gravity. To effect this, it is neceffary to extend a certain number of articulations, which have been more.or lefs . bent,](https://iiif.wellcomecollection.org/image/b33088536_0001_0551.jp2/full/800%2C/0/default.jpg)
