Note b — BOOK V.
Reading edition
In Man, and most other Animals, the Heart hath the Guard of Bones; but in the Lamprey, which hath no Bones, (no not so much as a Back-bone,) the Heart is very strangely secur’d, and lies immur’d, or capsulated in a Cartilage, or grisly Substance, which includes the Heart, and its Auricle, as the Skull——doth the Brain in other Animals. Powers Micros. Obser. 22.