. Bulletin of the British Museum (Natural History) Geology Supplement. . Fig. 26. Gonyaulacysta helicoidea (Eisenack & Cookson). Tabulation. Left, ventral view ; right, dorsal view. x c. 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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