Die Sigillarien der preussischen Steinkohlengebiete. I. Die Gruppe der Favularien (1887)

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Favularia trigona; Favularia elegans; Aspidiaria variolata; Sigillaria ichthyolepis; Sigillaria elegans; Sigillaria hexagona; Sigillaria Dournaisii; Sigillaria tessellata var. alpha; Sigillaria tessellata var. gamma; Sigillaria alveolaris; Sigillaria Knorrii; Sigillaria minima; Sigillaria ornata var. beta (major); Sigillaria ornata var. alpha (minor) High resolution image	Sigillaria Brochantii; Favularia nodosa; Sigillaria Dournaisii; Sigillaria minima; Sigillaria tessellata; Sigillaria conferta; Sigillaria sexangula; Sigillaria Morandii; Sigillaria Dournaisii; Sigillaria Eugenii; Sigillaria hexagonalis; Sigillaria Vanuxemi; Sigillaria elegans; Sigillaria ichthyolepis High resolution image	High resolution image