| author: | Beauchamp Pde |
| title: | Classe de Turbellaries. In P.-P. Grasse (ed): Traite de Zoologie; anatomie, systematique, biologie. IV. Plathelminties, Mesozoaries, Acanthocephales, Nemertiens. |
| publication: | 4, fasc. 1 (Masson et Cie: pages 35-212, 887-890). Paris: Masson et Cie. 944 pp. |
| year: | 1961 |