Full Idea
If 'man' and any other item similarly specified is a substance, then none of the contents of the account of man is a substance of anything. 'Animal', for instance, does not exist over and above particular animals.
Gist of Idea
Genera are not substances, and do not exist apart from the ingredient species
Source
Aristotle (Metaphysics [c.324 BCE], 1038b31)
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.217
A Reaction
[I think 'particular animals' refers to species, not individuals, here] I take it as self-evident that this implies that species do not exist, apart from the individuals that constitute them.