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Keywords from Image Description:
Haeckel Spyroidea. See fullsize image for numbers Triceraspyris gazella Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Haeckel Ehrenberg skeleton in side view Kunstformen der Natur plate Spyroidea see mpizkoeln mpg de html here mpizkoeln