Except that one has 19 notches
I hate to admit that I counted it twice before and came up with 18, appears that I need to open my eyes more. Or learn to count. :)
I have corrected it to 19 Notches in additional details
So, we need Scalloped (18 Notches) and (19 Notches). Not sure why it stopped at 17 and picked back up at 20