Then she cut off the mermaids tongue so that she became dumb and would never again speak or sing If the polypi should seize hold of you as you return through the wood said the witch throw over them a few drops of the potion and their fingers will be torn into a thousand pieces But the little mermaid had no occasion to do this for the polypi sprang back in terror when they caught sight of the glittering draught which shone in her hand like a twinkling star

Please fix the punctuation.
Then she cut off the mermaid's tongue, so that she became dumb, and would never again speak or sing. If the polypi should seize hold of you as you return through the wood, said the witch, throw over them a few drops of the potion, and their fingers will be torn into a thousand pieces. But the little mermaid had no occasion to do this, for the polypi sprang back in terror when they caught sight of the glittering draught, which shone in her hand like a twinkling star.