. Bulletin of the British Museum (Natural History) Geology Supplement. 8 UPPER CRETACEOUS TELEOSTS Material. numbers 48089a, 480896, 48092, 49544, all from the Upper Senonian of Sahel Alma, Lebanon, and all prepared by the transfer method in acetic acid. Specimen number 8436, being the negative impression of a complete fish in the Palaontologisches Institut der Westfalische Wilhelms-Universitat, Miinster. This latter specimen was that used by von der Marck (1873 : 60, pi. 2, fig. 4), and is from the Upper Senonian of Sendenhorst, Westphalia. Description. Neurocranium. A dorsal view of
. Bulletin of the British Museum (Natural History) Geology Supplement. 8 UPPER CRETACEOUS TELEOSTS Material. numbers 48089a, 480896, 48092, 49544, all from the Upper Senonian of Sahel Alma, Lebanon, and all prepared by the transfer method in acetic acid. Specimen number 8436, being the negative impression of a complete fish in the Palaontologisches Institut der Westfalische Wilhelms-Universitat, Miinster. This latter specimen was that used by von der Marck (1873 : 60, pi. 2, fig. 4), and is from the Upper Senonian of Sendenhorst, Westphalia. Description. Neurocranium. A dorsal view of the reconstructed neurocranium is shown in Text-figure 1. The neurocranium is elongate, shallow, relatively narrow, and drawn out preorbitally to enter into the composition of the rostral region. The mesethmoid extends the whole length of the rostrum and so too does the vomer below it. In the base of the orbit the parasphenoid contacts the vomer anteriorly in front of the lateral ethmoids. The frontals form most of the skull-roof and are un- ornamented, but bear two large lateral ridges which run longitudinally above the orbital region and demarcate a median interorbital depression. Lateral to the ridges, above the orbit, the frontals are curved, forming the upper margin to the orbit. The supraoccipital is small and contacts the parietals anteriorly and the epiotics laterally. The parietals are large and meet in the mid-line of the skull-roof anterior to the supraoccipital. Laterally the parietals curve ventro-laterally and are over- lapped by the pterotics, forming, presumably, the roof of the post-temporal eP° soc Fig. 1. Ichthyotringa furcata (Agassiz). Neurocranium in dorsal 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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