Row 1: Skip 4ch, 3tr/dc in next ch, *2ch, skip 8ch, 2d.tr/tr in next ch, 3d.tr/tr in each of the next 4ch, 2ch, skip 8ch, shell in next ch; rep from *, at the end of the row work 3tr/dc + 1ch + 1tr/dc (instead shell) in last ch, turn.
Row 2: 4ch, 3tr/dc in space of 1ch, * 3ch, 1dc/sc in each of the next 14 d.rt/tr below, 3ch, shell