. Bulletin of the Natural Histort Museum. Geology series. Figs 1, 2 lsopoma brachyptyctum (Schnur). 1, syntype; copy of Schnur. 1853: pi. 23, fig. 6; presumed from Eifelian limestone, Blankenheim, Germany; Schnur Collection, Institute, Bonn; x 2. 2, lectotype; a syntype from the Schnur Collection resembling that of Fig. 1; copy of Schmidt 1941: pi. 4, fig. 88; locality unspecified, but possibly Ahrdorf Formation, Eifelian, Germany; x 2. Both specimens are illustrated in dorsal, anterior and ventral views, but note that Schmidt illustrated the anterior view with the ventra

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. Bulletin of the Natural Histort Museum. Geology series. Figs 1, 2 lsopoma brachyptyctum (Schnur). 1, syntype; copy of Schnur. 1853: pi. 23, fig. 6; presumed from Eifelian limestone, Blankenheim, Germany; Schnur Collection, Institute, Bonn; x 2. 2, lectotype; a syntype from the Schnur Collection resembling that of Fig. 1; copy of Schmidt 1941: pi. 4, fig. 88; locality unspecified, but possibly Ahrdorf Formation, Eifelian, Germany; x 2. Both specimens are illustrated in dorsal, anterior and ventral views, but note that Schmidt illustrated the anterior view with the ventral valve uppermost. 3a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Museum (London). Andover : Intercept

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