Of swimming creatures that are destitute of feet, some have winglets or fins, as fishes: and of these some have four fins, two above on the back, two below on the belly, as the gilthead and the basse;
一
没有脚的动
有小翼或者鳍，如
；这样的动有有四只鳍，两只在
上，两只在腹部，如
和BASSE；
