University of California
Ucmp: Nemertini, the Shoelace Worm
General information about ribbon worms, also called Nemertini, and their relations to other worms. Contains pictures, links, and further reading.
Encyclopedia of Life
Encyclopedia of Life: Ribbon Worms
The Encyclopedia of Life presents this in-depth overview of Ribbon Worms (Nemertea), including their habitats, size, conservation status, and much more. Images of this phylum and maps of its global distribution can also be found here.