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CLOS analogue to TYPEP and SUBTYPEP

I am looking for a function analogous to TYPEP or SUBTYPEP in CLOS.
Given two class objects, I need to know whether one is a superclass of
the other.  I can't seem to find such a function in Chapter 2.  Have I
missed something, is this relegated to Chapter 3, or is there
something inherently bogus about what I'm trying to do?  It seems like
a rather ordinary thing, not terribly metaclassy.  This came up while
writing a program using CLOS that is intended to be a simple example.