. Bulletin of the British Museum (Natural History) Geology Supplement. ESPECIALLY MYCTOPHOIDS 213 teeth. Anteriorly the teeth are arranged into three distinct rows, a minute row of marginal teeth, a median row of slightly larger teeth and an internal row of much larger teeth. All of the teeth are similar, being long, thin, needle-like and slightly recurved. Posteriorly the teeth decrease in size and are confined to two rather than three rows. The anterior part of the maxilla, like that of the premaxilla, is inclined medially. The dorsal surface of the anterior part of the bone is excavated as
. Bulletin of the British Museum (Natural History) Geology Supplement. ESPECIALLY MYCTOPHOIDS 213 teeth. Anteriorly the teeth are arranged into three distinct rows, a minute row of marginal teeth, a median row of slightly larger teeth and an internal row of much larger teeth. All of the teeth are similar, being long, thin, needle-like and slightly recurved. Posteriorly the teeth decrease in size and are confined to two rather than three rows. The anterior part of the maxilla, like that of the premaxilla, is inclined medially. The dorsal surface of the anterior part of the bone is excavated as a shallow depres- sion into which the maxillary process of the palatine fits. The actual head of the maxilla is small and rounded, sandwiched between the dorsal surface of the vomer and the ventral surface of the antero-lateral mesethmoid projection. The articular process of the premaxilla fits against a shallow concave facet on the anterior edge of the maxilla just lateral to the maxillary head. The maxilla is an elongate shaft of bone, stout anteriorly but becoming flattened and deepened posteriorly. The lateral face is smooth and dorsally supports two supramaxillae. Both supramaxillae are small and elongate, the anterior one being the smaller. epo pa smx2 iop pop ang Fig. 90. Aulopus filamentosus. Skull in lateral view. 10mm Mandible. The mandible is shown in medial and lateral views in Text-figures 89 and 90. It is long and deepened posteriorly. The dentary forms the greater part of the ventral border, the whole of the oral border and a considerable proportion of the lateral face. In lateral view the dentary is V-shaped with the indentation occluded by the anterior part of the articular. The symphysis is constricted and blunt and each mandible has an inflected ventral edge. Ventro-laterally a tube within the bone opens to the exterior by a row of small pores. The mandibular sensory canal runs within the tube. Posteriorly the ventral limb of the dentary. Please no
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