A Description of three Acoela frorn the Gulf of Naples. 
311 
1910. Löhner, L., Untersuchungen über Polychoerus caudatus Mark. ibid. 95. Bd. 
1913. Über die systematische Stellung der heute im Genus Amphiscolops 
vereinigten Arten, in: Z. Anz. 43. Bd. 
1911. Löhner, L., und H. Micoletzky, Convoluta pelagica n. sp. und Monochoerus 
illardatus n. g. n. sp. zwei neur Plankton-Acoela der Adria, ibid. 37. Bd. 
1911. und Über zwei neue pelagische Acölen des Golfes von Triest. 
in: Zeit. Wiss. Z. 98. Bd. 
1912. Luther, Alex., Studien über acöle Turbellarien aus dem Finnischen Meer- 
busen, in: Acta Soc. Fauna Flora Fennica. 36. Bd. 
1913. Peebles, f., One Some acoelous Fiatworms from the Gulf of Naples. in: Zool. 
Anz. 43. Bd. 
1892. Pereyaslawzewa, S., Monographie des Tm'bellaries de la Mer noire. in: Nachr. 
Neuruss. Natiu-f. Ges. Odessa. 17. Bd. 
1894. Saccardo, P. A., Chromotaxia seu nomenclator Colorum. Patavia. 
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Naturf. Moskau. 
Explanation of Figures. 
Plate 10. 
Figures 1 — 2. Äphanostoma pulchella. 
Fig. 1. Living worm, shghtly compressed. &s, bursa seminahs; c, cilia; /, oil globu- 
les; fg, frontal gland; m, mouth; o, ovum; p, copulatory organ; s, statocyst; v, 
vacuolated tail cells; vd, vasa deferentia. 120 diam. 
Fig. 2. Sketch of living worm, showing form when swimming. 30 diam. 
Figures 3 — 7. Monochoerus lineatus. 
Fig. 3. Brauch of seaweed upon which three worms are resting. About twice the 
natural size. 
Fig. 4. Dorsal view of worm showing form when swimming. 25 diam. 
Fig. 5. Dorsal view of animai when contracted. Same magnificati on. 
Fig. 6. Living worm, slightly compressed under cover-glass. &s, bursa seminahs; e, 
eye; m, mouth; mp, chitinoiis mouth-piece; o, ovum; p, penis; pi, pigment; 
s, statocyst; vd, vasa deferentia. 35 diam. 
Fig. 7. Mature egg showing pigment granules. 150 diam. 
Figm-es 8 — 10. Amphiscolops fuligineus. 
Fig. 8. Sketch of dorsal surface. Animai partially contracted. 15 diam. 
Fig. 9. Ventral view of same worm. 
Fig. 10. Sketch of living worm, compressed under the cover-glass. &s, bursa semi- 
nahs; c, cilia; e, eye; fd, food; fg, frontal gland; m, mouth; mp, mouth-piece; 
0, ovum p, penis; s, statocyst; vd, vasa deferentia. 50 diam. 
