Cynthia melocactus (Haeckel) = Boltenia echinata (Linnaeus, 1767), individual from above Cynthia melocactus (Haeckel) = Boltenia echinata (Linnaeus, 1767), individual from the front Cynthia melocactus (Haeckel) = Boltenia echinata (Linnaeus, 1767), individual in lengthwise section Molgula tubulosa (Forbes) = Eugyra arenosa (Alder & Hancock, 1848), mouth region Fragarium elegans (Giard) = Aplidium elegans (Giard, 1872), colony Polyclinum constellatum (Savigny) = Polyclinum constellatum Savigny, 1816, colony Polyclinum constellatum (Savigny) = Polyclinum constellatum Savigny, 1816, part of colony Synoecum turgens (Phipps) = Synoicum turgens Phipps, 1774, part of colony Botryllus polycyclus (Savigny) = Botryllus schlosseri (Pallas, 1766), part of colony Botryllus rubigo (Giard) = Botryllus schlosseri (Pallas, 1766), part of colony Botryllus Marionis (Giard) = Botryllus schlosseri (Pallas, 1766), part of colony Botryllus helleborus (Giard) = Botryllus schlosseri (Pallas, 1766), part of colony Polycyclus cyaneus (Drasche) = Botryllus schlosseri (Pallas, 1766), colony Botrylloides purpureus (Drasche) = Botrylloides leachii (Savigny, 1816), part of colony. (https://en.wikipedia.org/wiki/Kunstformen_der_Natur#/media/File:Haeckel_Ascidiae.jpg)