SQL & PL/SQL

Hi everyone.
I have issued the following statement

SQL> COMMENT ON TABLE employees IS
2 'Info. about employees of company';

Comment created.

Where are these comments stored in the data dictionary?

I tried to view USER_TABLES with the following stmt.

SQL> SELECT table_name, column_name, char_used
2 FROM user_tab_columns
3 WHERE table_name = 'employees';

no rows selected

I am in the scema HR that comes with Oracle 9i, and I couldn't understand the problem. But it shows the table employees when I selected the table_name from that view with the stmt.

SQL> edit
Wrote file afiedt.buf

1* select table_name from user_tab_columns

Can someone help me as soon as possible.

Thank you.