The scallop is getting larger. So, it's time to replace the ch 5's with ch 6's:
Turn. Skip 1st ch-5 space. * ch 6, sc 1 in next ch-5 sp* 12 times. ch 6. sc 1 in next ch-5 sp.
If this the last scallop, replace the last "sc 1" of row 6 with "join to sc from first scallop". The pic shows the first and last scallop being joined -- with a slip stitch.