. Bulletin of the British Museum (Natural History). 36 P. H. GREENWOOD. Hhy Fig. i6. Petrocephaltts calostoma: ventral hyoid muscles. A. After removal of the skin. B. After removal of the posterior intermandibularis 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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