How to do a Shell Stitch

This is from a book that was published in 1980. ( Yes I keep all my Crochet Books,lol)

Shell Stitch
This is one of many varieties of Shell Stitch. Once you have learnt this basic stitch, you'll find directions for others easy to follow.

Make a foundation chain of 25 stitches ( or other multiple of 6 stitches plus 1) for practice piece.
1st Row: work 2dc in 4th chain from hook (half shell made), skip 2 ch, sc in next ch, *skip 2 ch, work 5dc all in next ch (shell made), skip 2 ch, sc in next ch. Repeat from * across, ch 3, to turn.
2nd Row: Work 2dc in first sc ( half shell), skip 2 dc of shell, sc in next dc, * skip 2dc of same shell, work shell ( 5dc) in next sc, skip 2dc of next shell, sc in next dc. Repeat from * across, working last sc in top of turning ch. Ch 3, turn. Repeat 2nd Row for pattern.