Figs. 1 to 6.—Bdellamaris eptatreti n.g., n.sp. (1) From a dissection from the ventral aspect to show the somital arrangement of the alimentary canal and distribution of clitellar gland cells and their ducts. (2) Annulation of neck and anterior abdominal somites from ventral aspect of a specimen showing a developed copulatory area and (3) a composite diagram of the same based on the dissection of several specimens. (4) Annulation of posterior abdominal somites, dorsal aspect. (5) Capsulation of the circumpharyngeal ganglionic mass and emergent nerve roots drawn from a dissection stained with acetic-alum-carmine. (6) The anterior portion of the reproductive system from the left lateral aspect with the pars glandularis indicated by a broken line.