. Bulletin of the British Museum (Natural History) Geology Supplement. 156 ELOPIFORM FISHES 50C Ptf. sef boc 5 mm Fig. 76. Albula vulpes (Linnaeus). Neurocranium in posterior view. Composite of several specimens. In posterior view (Text-fig. 76) the neurocranium shows large sub-epiotic fossae, small post-temporal fossae and large otic bullae. The supraoccipital is relatively larger than in Pterothrissus, due to its more extensive ossification. Two further features of interest in the posterior neurocranial wall of A. vulpes are the small ' isolated ' portion of the pterotic and
. Bulletin of the British Museum (Natural History) Geology Supplement. 156 ELOPIFORM FISHES 50C Ptf. sef boc 5 mm Fig. 76. Albula vulpes (Linnaeus). Neurocranium in posterior view. Composite of several specimens. In posterior view (Text-fig. 76) the neurocranium shows large sub-epiotic fossae, small post-temporal fossae and large otic bullae. The supraoccipital is relatively larger than in Pterothrissus, due to its more extensive ossification. Two further features of interest in the posterior neurocranial wall of A. vulpes are the small ' isolated ' portion of the pterotic and the foramen between the epiotic and supra- occipital. The ' isolated ' portion of the pterotic represents the wall of the caecal end of the subtemporal fossa. Such a condition of the pterotic appears to be unique among lower teleosts, but in these the subtemporal fossa is rarely as deep, and even more rarely is it associated with a deep sub-epiotic fossa. The foramen between the supraoccipital and epiotic is occupied by epaxial musculature passing through to the post-temporal fossa. The intercalar is small, as usual in albuloids, with little extension on the lateral face of the neurocranium. Posteriorly the surface of the intercalar bears ridges for the insertion of the tendon from the post-temporal. The lateral neurocranial wall has in part been described by Ridewood (1904). Significant points are the depth of the roofed dilatator fossa ; the posteriorly placed opening of the jugular canal, close to the suture between the prootic and exoccipital;. 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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