Three aspects of perception.
Biology and the problem of levels of reality.
Aristotle and modern biology.
Is genus to species as matter to form?
Two evolutionary theories.
Statistics and selection.
Bohm's metaphysics and biology.
Explanation and evolution.
On the nature of natural necessity.
On some distinctions between men and brutes.
The characters of living things. I: the biological philosophy of Adolf Portmann.
The characters of living things. II: The phenomenology of Erwin Straus.
The characters of living things. III: Helmuth Plessner's theory of organic models [sic].
People and other animals.
