. Bulletin of the British Museum (Natural History), Geology. Fig. 59 Prohepialus sp., (scale, X 10 000; lr longitudinal ridge, cr cross rib, w window).. Fig. 60 Gurnetia durranti Cockerell, holotype. See also Fig. 66. (Scale line = 2mm). 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 British Museum (Natural History). London : BM(NH)

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