The working thread is held down with the left thumb, the needle then takes up a small portion of the material at right angles to the drawn line, with the working thread underneath the needle point (so creating a loop). The needle is pulled through the loop made by the working thread. The process is repeated until the line is completed. When the coral stitches are worked very closely together, the stitch is sometimes known as a knotted outline stitch.
Also known as: beaded stitch, coral knot, German knot stitch, knotted stitch or snail trail.
Source: THOMAS, Mary (1934). Mary Thomas's Dictionary of Embroidery Stitches, London: Hodder and Stoughton, p. 52.
GVE