FIGURE 9 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 9. Eclipidrilus pacificus, atrial ampullae (A­C, typical specimens, Hoh River, Washington), (D, Variant 1, Peavine Ridge, Oregon). A—sagittal section. B—transverse section; the four vasa deferentia are visible inside the transverse­circular muscle layer. C—sagittal section, detail of outer longitudinal and inner transverse­circular muscle layers. D—transverse section of atrial ampulla, showing outer longitudinal and thin, transverse­circular muscle layers. Abbreviations: lm—longitudinal muscle; pr—prostate gland; tm—transverse­circular muscle. Scale bars 50 µm.