Slip stitch
From Open Stitch Dictionary
Instructions
Written
Draw the needle through the back part of a foundation chain stitch, or in the course of the work through the back part of a stitch of the preceding row, wind the cotton round the needle, and draw it through the stitch and loop on the needle. The illustration shows a number of slip stitches, the last of which is left quite loose; the arrow marks the place where the needle is to be inserted for the next stitch.
