1. Coe, W. R.: Notizen über den Bau des Embryos vonDistomum hepaticum. Zool. Jb., Anat.9, 561–570 (1896).
2. Cort, W. W.: Notes on the eggs and miracidia of the human schistosomes. Univ. California Publ. Zool.18, 509–519 (1919).
3. Haitsuma, J. P. van: Studies on the trematode familyStrigeidae (Holostomidae). No. 23.Diplostomum flexicaudum (Cort and Brooks) and stages in its life history. Pap. Mich. Acad. Sci., Arts a. Letters13, 483–516 (1931).
4. Hunter, W. S. andG. W. Hunter: Studies onClinostomum. II. Miracidium ofC. marginatum (Rud.). J. of Parasitol.21, 186–189 (1935).
5. Isii, Y.: Studies on the life history ofFasciolopsis buski. II. On the structure and biological characters of the miracidum. J. Taiwan med. Assoc.33, 379–390 (1934).