[23] De partibus animalium, i. 1; 641ᵇ 12.

[24] Physics, ii. 8, 3; 198ᵇ 6. This passage is considerably abbreviated and slightly paraphrased.

[25] De partibus animalium, i. 1; 641ᵅ 7.

[26] Historia animalium, viii. 1; 588ᵇ 4.

[27] De partibus animalium, iv. 5; 681ᵅ 15.

[28] De partibus animalium, iv. 5; 681ᵅ 36.

[29] De partibus animalium, iv. 5; 681ᵅ 10.

[30] De generatione animalium, i. 21; 729ᵅ 21.

[31] De generations animalium, i. 18; 725ᵅ 22.

[32] De generatione animalium, i. 19; 727ᵅ 31.