. Bulletin of the British Museum (Natural History), Geology. surface of the frontal alongside the median suture. A bundle of extremely fine diverging tubes extends from the canal tube midway above the orbit to the surface of the bone in the anterior part of the orbital region. A number of much shorter tubes extends from the posterior part of the canal, following a curved path to the surface. Anterior to the orbit, as usual, the frontal forms an open trough which housed the supraorbital sensory canal. The nasal is not preserved; it probably formed a scroll around the sensory canal as usual. The
. Bulletin of the British Museum (Natural History), Geology. surface of the frontal alongside the median suture. A bundle of extremely fine diverging tubes extends from the canal tube midway above the orbit to the surface of the bone in the anterior part of the orbital region. A number of much shorter tubes extends from the posterior part of the canal, following a curved path to the surface. Anterior to the orbit, as usual, the frontal forms an open trough which housed the supraorbital sensory canal. The nasal is not preserved; it probably formed a scroll around the sensory canal as usual. The rostral is visible in ventral view in It enclosed only a short length of the rostral commissure on either side of the midline. The bone forms two broad wings which lay above the anterior ends of the antorbitals. The vomerine teeth are exposed from below in (Fig. 26). These are tall and Fig. 23 Propterus elongatus Wagner. Skull roof, as preserved in Dashed lines indicate restored parts, x 6. 170. 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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