ROLES & such

I'm trying to identify who has which privs in one of my instances. I have a handleful of users (schemas) that show they have been granted "HR_ALL" role. At this point in time, I'm not sure that this role really exists. (See below.) Where else should I be looking to see which, if any, privs are associated with the HR_ALL role?

SQL> set echo on
SQL> select grantee, granted_role
  2 from dba_role_privs
  3 where grantee = 'ALTAC'
  4 /

GRANTEE                        GRANTED_ROLE
------------------------------ ------------------------------
ALTAC                          CONNECT
ALTAC                          HR_ALL

SQL> select role from role_role_privs
  2 where role = 'HR_ALL'
  3 /

no rows selected

SQL> select role from role_sys_privs
  2 where role = 'HR_ALL'
  3 /

no rows selected

SQL> select role from role_tab_privs
  2 where role = 'HR_ALL'
  3 /

no rows selected

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