17. περὶ ζᾠων μορίων. De partibus animalium: Philosophy of the causes of the facts about animals, i.e. their functions.
18. † περὶ ζᾠων κινήσεως: De animalium motione: On the motion of animals. [Ascribed to the school of Theophrastus and Strato by Zeller.]
19. περὶ ζᾠων πορείας: De animalium incessu: On the going of animals.
20. περὶ ζᾠων γενἐσεως: De animalium generatione: On the generation of animals.
21. † περὶ χρωμάτων: De coloribus: On colours. [Ascribed to the school of Theophrastus and Strato by Zeller.]
22. † πεςὶ ἀκουστῶν: De audibilibus. [Ascribed to the school of Theophrastus and Strato by Zeller.]
23. † Φυσιογνωμονικά: Physiognomonica: On physiognomy, and the sympathy of body and soul.
24. † περὶ φυτῷν: De plantis: On plants. [Not Aristotle’s work on this subject.]
25. † περὶ θαυμασίων ἀκουσμάτων: De mirabilibus ausculationibus: On phenomena chiefly connected with natural history.
26. † Μηχανικά: Quaestiones mechanicae: Mechanical questions.