And among locusts: Any one that has four legs, four wings, jointed legs, and its wings cover the greater part of its body. R’ Yose says: And its name must be chagav. And among fish: whatever has a fin and a scale. R’ Yehudah says: Two scales and one fin. These are the scales: those that are fastened to it; and fins: those with which it glides.

[If] an animal is in difficult labor, and the fetus put forth its foreleg and drew it back, it is permissible for eating. [If] it put forth its head, although it drew it back, it is regarded as having been born. [If] one cuts off [part] of the fetus that is in her womb, it is permissible for eating; from the spleen or from the kidneys, it is prohibited to be eaten. This is the general rule: What is [part of] its body is prohibited; what is not [part of] its body is permissible.