SHELL OR SCALLOPED TUCKS :---This is a very decorative tuck made by hand . Mark and crease the
fabric as for a straight tuck of about 1/4" width . On the line of
stitching mark uniformly spaced darts about 1/2 " apart .Stitch the
tuck using small running stitches . As you come to each dart take
two over cost stitches through the dart and pull tite , before
proceeding further with the running stitches .