Cnidaria

Århus, Jylland, Danmark

Aquarium, Paris

Kattegatcentret Grenå

Danmarks Akvarium

Spotted Jellyfish Mastigias papua at the Monterey Bay Aquarium.

Cephea cepheaCauliflour Jellyfish, Cephea cephea at Marsa Shouna, Red Sea, Egypt #SCUBAFrom Wikimedia Commons

Merulina regalis.

Anemonia sargassensis.

Porites porites forma Furcata Lam. Extreme breadth of specimen, 26 cm..

Halecium tenellum Hincks.

Madreporaires agreges.--Astroides calycularis. 1, polypes retractes et epanouis. 2, polypier dont les polypes ont ete enleves

Schizotricha tenella (Verrill). A.Part of hydrocladium.....

1. Hormathia Margarita, 2. Phellia Brodricii, 3. Peachia Hasata, 4. P. Undata, 5 Stomphia Churchiae, 6. Ilyanthus Mitchellii.

Figure 5.Color figures of skeleton of various Alaskan stylasterids: A Errinopora fisheri B, G–I Errinopora nanneca C, F Errinopora undulata, D Errinopora disticha E Errinopora zarhyncha. A holotype, USNM 1123526 B holotype, USNM 42875 C holotype, USNM 112327 D holotype, USNM 1123524 E holotype, USNM 42874 F lateral view of a large paratype, USNM 1123528 G lamellate colony with digitate distal branches, USNM 1123462 H lamellate colony, USNM 44070 I intermediate form between lamellate and digitate, USNM 1123510.

Figure 1.Living specimens of Leptoseris troglodyta sp. n. a Philippines, Cebu Strait, W of Bohol, NW of Cabilao Island, 10–30 m depth (7 November 1999) b Indonesia, NE Kalimantan, Berau Islands, S of Derawan Island, 7–10 m depth (4 October 2003).

Figure 1.Sinularia australiensis sp. n., A holotype NTM C14519 B paratype NTM C14492 C paratype NTM C14520 D paratype NTM C14521. Scale at A also applies to B, scale at C also to D.

Figure 3.Anemonia sargassensis. A Live specimen in natural habitat B Oral view C Pedal disc view D Cross section through distal column showing mesenteries; arrows indicate siphonoglyphs E Detail of cross section through distal column showing a siphonoglyph F Detail of retractor and parietobasilar muscles G Longitudinal section through margin showing acrorhagi and marginal sphincter muscle H Longitudinal section through base showing basilar muscles I Cross section through tentacle J–U Cnidae.– acrorhagi: J small basitrich K basitrich L holotrich; actinopharynx: M small basitrich N microbasic p-mastigophore; column: O basitrich; filaments: P basitrich Q microbasic b-mastigophore R microbasic p-mastigophore; tentacle: S small basitrich T basitrich U spirocyst. Abbreviations.– acr: acrorhagi, bm: basilar muscle, e: epidermis, fo: fosse, g: gastrodermis, la: larvae, lm: longitudinal muscle, m: mesoglea, mp: marginal projection, od: oral disc, pd: pedal disc, pm: parietobasilar muscle, rm: retractor muscle, s: siphonoglyph, sp: sphincter, t: tentacle. Scale bars: A–C: 10 mm; D–I: 200 μm; J–U: 25 μm.

Figure 2.Sclerites of Sphaerasclera flammicerebra comb. n. MNHN-IK-2012-12004. A–C Surface layer of polyparium A Small radiates (0.05 mm scale bar) B Larger radiates and two small spheroids C Large tuberculate spheroids D–F Interior of polyparium D Small radiates (0.05 mm scale bar) E Larger radiate and three small spheroids F Large tuberculate spheroids.

Figure 3.Holotype of Cycloseris boschmai sp. n. (RMNH Coel. 8333). Indonesia, Banda, Danish Exp. to the Kei Islands, 1922. a Upper side b Lower side. Scale bar: 0.5 cm.

Figure 14.Scanning electron micrographs of polyp sclerites of Ovabunda impulsatilla (Verseveldt & Cohen, 1971) holotype (HUJ I Co. 84). a Regular sclerites b Fused sclerites. Scale bar 10 µm.