Conversation so far:
What was platos use of myth?
the influence of Pythagoras upon Plato also appears to have significant discussion in the philosophical literature.
What types of myths were there?
There is evidence that Plato possibly took from Pythagoras the idea that mathematics and, generally speaking, abstract thinking is a secure basis for philosophical thinking.
Was there any specific type of a myth that Plato mentions?
Plato, in general, distinguished between three types of myth.

Question: What were these types?
Self-contained rewrite: What were the three types of myth distinguished by Plato?