Lacy shell: (tr, ch1, tr, ch1, tr) in same st
Row 1: hdc in 3rd ch from hook, *sk 3 ch, lace shell in next ch, sk 3 ch, hdc in next ch; rep from * to end across
Row 2: ch4, turn, (tr, ch1, tr) in same st, *hdc in center of next lacy shell, work lacy shell in next hdc; rep from * to end across, hdc in last lacy shell, (tr, ch1, 2tr) in last hdc
Row 3: ch2, turn, hdc in same st, *lacy shell in next hdc, hdc in center of next lacy shell; rep from * to end across, work lacy shell into next hdc, hdc in turning ch
Rep rows 2-3 until you have reached the desired length of your scarf. I blocked this to open up the lace. After blocking, if you choose to block it, seam the ends together.