Hydrozoans

Gonionemus murbachii.

Clytia notiformis (McCr.).

Eudendrium carneum Clarke.

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.

South Pacific Ocean, Duration 10 seconds

Davenport, California, USA

Dendrogramma discoides gen. et sp. n., various aspects of holotype.Figure 7 from Just J, Kristensen RM, Olesen J (2014) Dendrogramma, New Genus, with Two New Non-Bilaterian Species from the Marine Bathyal of Southeastern Australia (Animalia, Metazoa incertae sedis) – with Similarities to Some Medusoids from the Precambrian Ediacara. PLoS ONE 9(9): e102976. doi:10.1371/journal.pone.0102976 A, adoral view. B, enlarged part of disc; C, aboral view; D, oblique adoral view. Photographs taken after shrinkage. doi:10.1371/journal.pone.0102976.g007

[Echinoderms of the Subantarctic Islands of New Zealand]. 1-2. Hippocrene; 3-6, Phialella

Thuiaria thuja (Linn.).

Diphyes bipartita. After Mayer.

Hybocodon prolifer.

Portuguese Man-of-War.

Gonionemus vertens A. Ag..

Clytia proterium.

Eudendrium tenue A. Ag..

Figure 7.Female paratype of Errinopora undulata, USNM 1123528: A–B, D plate surface showing female ampullae, dactylopore spines, and gastropores C cross section of plate showing several gastrostyles E–F coenosteal texture G–H lateral view of a gastrostyle and detail of spination I–J lateral and apical view of a robust dactylostyle.

South Pacific Ocean, Duration 48 seconds

Davenport, California, USA

Dendrogramma gen. nov., all 15 paratypes of D. enigmatica and (with *) D. discoides.Figure 1 from Just J, Kristensen RM, Olesen J (2014) Dendrogramma, New Genus, with Two New Non-Bilaterian Species from the Marine Bathyal of Southeastern Australia (Animalia, Metazoa incertae sedis) – with Similarities to Some Medusoids from the Precambrian Ediacara. PLoS ONE 9(9): e102976. doi:10.1371/journal.pone.0102976 Photographs taken after shrinkage (see Material and Methods). doi:10.1371/journal.pone.0102976.g001

AEgina pachyderma.

Gonothyraea loveni Allm..

Melicertum campanula Esch..