Notoplana alcinoi (MNCN 4.01/3476 to 3492). Histological sections are antero-posteriorly oriented: A. Dorsal view of the living specimen; B. Detail of the eyes; C. Histological section of the male copulatory organs; D. Histological section of the female copulatory organs; F. Transversal section of the prostatic vesicle; G. Dorsal view of a living specimen showing a different morphotype (MNCN 4.01/4008). Abbreviations: cg, cemental glands; ed, ejaculatory duct; eg, extravesicular glands; el, epithelial lining; ev, external vagina; fa, female atrium; fp, female pore; i, intestine; iv, internal vagina; lv, Lang’s vesicle; ma, male atrium; mp, male pore; mw, muscular wall; ov, oviduct; pv, prostatic vesicle; s, stylet; sv, seminal vesicle; vd, vas deferens.