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XV
Figs. 12. 13, 14, 15, 16. Spicules from body and tentacles of a polyp.
Figure 17. Spindles from oesophagus and gastral filaments, magnified.
— 18. Cruciform spicules (Vierling) from same parts, magnified.
Pl. X.
Figure 1. Göndul mirabilis, on a fragment of Lophelia prolifera, natural size: a) attaching disk.
— 2. Same animal, ventral aspect, magnified: a) attaching disk; b) a pinnule; c) the two uppermost pinnules, united;
d) inner margin of pinnule, united with the rachis; e) outer margin of pinnule; f) an axial polyp.
— 3. A piece of the ventral surface, covered by a thick layer of epithelium and mucus, magnified.
— 4. Göndul mirabilis, dorsal aspect, magnified: a) attaching disk; b) medial line; c) the uppermost pinnules, united;
d) outer (upper) margin of pinnule; e) zooids.
— 5. Same animal, lateral aspect, magnified: a) attaching disk; b) inner margin of pinnule; c) cell in which the polyp is
retracted.
— 6. A cell, showing the spicular arrangement, magnified.
— 7. A cell, with extended polyp, magnified: a) upper margin of cell; b) polyp-body with its tentacles.
— 8. A long spicule from the cell, magnified.
— 9. A short do. do. do. do. do.
— 10. A tentacle, magnified: a) spicules; b) pinnules.
— II. Rachis, opened longitudinally on the ventral surface, magnified: a) dorso-lateral valves; b) ventro-lateral valves;
c) rise and fall on the free undulating margin of a dorso-lateral valve; d) the dorso-lateral valves united in the
upper fourth of the rachis; e) the line indicating the suture; f) ventro-lateral valves.
— 12. Transverse section of the rachis in its lowermost fourth but one, magnified: a) dorso-lateral valves; b) ventral
canal; c) dorsal canal; d) ventro-lateral valves; e) lateral canals; f) nutritive canals in the çoenenchym.
— 13. Calcareous corpuscles in the valves, magnified.
— 14 Entodermic cells on the valves, magnified.
— 15. Ectodermic cells on the rachis, magnified.
— 16. Brown-coloured cells underneath the ectodermic cells, magnified: a) oblong cells (mucous cells?); b) round do.
— 17. Transverse section of the fibrillous connective tissue of the polypidom, magnified 600 times, drawn by Camera
lucida: a) corpuscles of connective tissue, with offshoots; b) a nutritive canal with its epithel.
— 18. Transverse section of a polyp, magnified: a) connective tissue; b) longitudinal muscles on septum; c) transverse
muscles on do.; d) pigmented epithel on outer wall of oesophagus.
— 19. Entodermic cells, investing the chambers, magnified.
— 20. Brown-coloured cells, covering the outer wall of the oesophagus, magnified.
Pl. ’XI.
Figure i. Cladiscus Lovéni, dorsal aspect, magnified.
— 2. A fragment of the same animal, ventral aspect, magnified.
— 3. A dorso-lateral region, with polyps and zooids, magnified.
— 4. A polyp, magnified.
— 5. Pennatula distorta, varietas aculeata, ventral aspect, natural size.
— 6. A fragment of the same animal, dorsal aspect, natural size.
— 7. A polyp, magnified.
— 8. A spiniform zooid, surrounded by zooids of usual structure, magnified: a) long spicules.
— 9. A zooid of usual structure, magnified.
— 10. Spicules from the skin.
Pl. XII.
Figure 1. Kophobelemnon Möbii, dorsal aspect, natural size.
— 2. A fragment of the same animal, ventral aspect, natural size.
— 3. Spicules in the skin, slightly magnified.
— 4. The same kind of spicules, more highly magnified.
— 5. A transverse section of the rachis, magnified: a) a zooid; b) spicules in the elongated (inner) connective tissue;
c) generative products of a zooid.
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