Also when joining the rounds after ss to the starting chain I also did another ss in the next stitch and then into the shell opening. this keeps the shells looking the same. if you just ss into the starting chain and then the opening your edging on your shells will be lost and look more like a flat line where it joins.
So this is my joining method. You can click on the photos for larger images.
Make a chain that is 65 stitches long and fasten off. Make another chain 26 stitches long and then SC into the 26th stitch of the previous chain and SC for a total of 13 stitches then chain 26 stitches and fasten off. It should look like the tie in this photo.
Now slip each half of the hanger cover onto your hanger and place the tie behind the hanger as shown.