. Bulletin of the British Museum (Natural History), Geology. REVISION OF ACTINOPTERYGIAN AND COELACANTH FISHES 295 process is well developed and lies at right angles to the main axis of the bone. A thickened strengthening ridge runs down from the opercular process to the base of the hyomandibular (Text-fig. 31). The foramen for the hyomandibular nerve is near the centre of the bone, just dorsal to the junction of the lower edge of the opercular process. The distal end of the hyomandibular is not quite so rounded as its head, but it is again strengthened for articulation with the symplectic and

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. Bulletin of the British Museum (Natural History), Geology. REVISION OF ACTINOPTERYGIAN AND COELACANTH FISHES 295 process is well developed and lies at right angles to the main axis of the bone. A thickened strengthening ridge runs down from the opercular process to the base of the hyomandibular (Text-fig. 31). The foramen for the hyomandibular nerve is near the centre of the bone, just dorsal to the junction of the lower edge of the opercular process. The distal end of the hyomandibular is not quite so rounded as its head, but it is again strengthened for articulation with the symplectic and 10 mm Fig. 32. Caturus chirotes (Agassiz). Ceratohyal and hypohyal of the left side. From 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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