Mutus (47 miles) is a pretty large formation. Its walls reach up to over 2 miles from its large, flat floor. There are three craters within the walls. The largest is partially on the northeastern rim and is 14 miles across. On the southwest floor is a well formed 10 mile crater and on the eastern floor is a 9 mile crater. There is lots of detail visible in 4 inches of aperture. Look for it 5 days after new Moon.
Manzius (59 miles) has a rim about 2 miles above its large flat floor. There is an 11 mile crater on the southern rim. Look for long shadows when the sun is rising on the great formation.