Full Idea
A principle of individuation tells us what is to count as one instance of a given kind, such as one ship. A criterion of identity is what makes for the identity or diversity of items of a given kind, to distinguish this ship from that ship.
Gist of Idea
Individuation principles identify what kind it is; identity criteria distinguish items of the same kind
Source
E.J. Lowe (The Possibility of Metaphysics [1998], 9.5)
Book Reference
Lowe,E.J.: 'The Possibility of Metaphysics' [OUP 2001], p.200
A Reaction
So individuation picks out type/qualitative identity, and identifying picks out token/numerical identity. This agrees with Idea 7926, but is a shift from the usage Lowe mentions in Idea 8290. Common usage makes the technical terms unclear.
Related Ideas
Idea 8290 One view is that two objects of the same type are only distinguished by differing in matter [Lowe]
Idea 7926 We 'individuate' kinds of object, and 'identify' particular specimens [Macdonald,C]