. Bulletin of the British Museum (Natural History), Geology. 2l8 TWO UPPER CRETACEOUS SALMONIFORM no evidence that the antorbital and supraorbital had any relation with the infra- orbital sensory canal. The supraorbital (So, Figs, i, 5, 6) is a large, oval bone, overlying the supraorbital flange of the frontal posteriorly and extending antero-ventrally. The anterior half of the bone has a ridge along its centre and is angular in section. The antorbital (Ao, Figs. I, 5) is a small, comma-shaped bone, with a broad posterior part articulating with the lateral face of the supraorbital, and a slend
. Bulletin of the British Museum (Natural History), Geology. 2l8 TWO UPPER CRETACEOUS SALMONIFORM no evidence that the antorbital and supraorbital had any relation with the infra- orbital sensory canal. The supraorbital (So, Figs, i, 5, 6) is a large, oval bone, overlying the supraorbital flange of the frontal posteriorly and extending antero-ventrally. The anterior half of the bone has a ridge along its centre and is angular in section. The antorbital (Ao, Figs. I, 5) is a small, comma-shaped bone, with a broad posterior part articulating with the lateral face of the supraorbital, and a slender anterior shaft fitting against the upper edge of the lachrymal. The lachrymal and infraorbitals are very thin, flimsy bones. The lachrymal (Lac, Figs. 5, 6) is large and roughly triangular, meeting the antorbital above and over- lapping the supramaxillae below. The infraorbital sensory canal passed through a tube near the upper edge of the bone, giving off three large branches which open near the ventral edge. The second infraorbital (I02, Fig. 6) is a slender bone, about Epofpa|f^-^ 4 mm Fig. 6. Gaudryella gaudryi (Pictet & Humbert). Skull as preserved in , Hajula, Lebanon. The suffixes ' r ' and ' 1 ' denote bones of the right and left side, explanation of other abbreviations p. 296. equal to the lachrymal in length, with the sensory canal passing through a tube along its centre. There is no evidence of pores or branches of the canal in the second infraorbital, but this is possibly due to deficiencies of preservation. The third infraorbital (I03, Figs. 5, 6) is short but expanded posteriorly, extending back to the preopercular. The tube for the sensory canal runs some distance from the orbital margin of the bone, and is bent in the middle of the bone, giving off a short branch at this angle. Like the third, the large fourth infraorbital (I04, Figs. 6, 9) is expanded, reaching the preopercular, and has the tube for the sensory canal some distance from. Plea
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