. Bulletin of the British Museum (Natural History) Geology Supplement. 24 UPPER CRETACEOUS TELEOSTS through a small foramen medial to the facial foramen into a canal which opens ventrally into the myodome. The posterior opening of the jugular canal only trans- mitted the jugular vein. Dorso-lateral to the pars jugularis a large foramen trans- mitted the hyomandibular nerve. Ventro-laterally a small foramen leads upwards through a canal into the pars jugularis, and this carried the orbital artery. Through the anterior opening of the pars jugularis the jugular vein, the orbital artery, and the b
. Bulletin of the British Museum (Natural History) Geology Supplement. 24 UPPER CRETACEOUS TELEOSTS through a small foramen medial to the facial foramen into a canal which opens ventrally into the myodome. The posterior opening of the jugular canal only trans- mitted the jugular vein. Dorso-lateral to the pars jugularis a large foramen trans- mitted the hyomandibular nerve. Ventro-laterally a small foramen leads upwards through a canal into the pars jugularis, and this carried the orbital artery. Through the anterior opening of the pars jugularis the jugular vein, the orbital artery, and the buccal branches of both the trigeminal and the facial nerves were transmitted. Two very small foramina are also found in the lateral wall of the pars jugularis and may have transmitted a small artery and vein into the muscle masses next to the prootic. Several additional foramina are found in the hind wall of the orbit. The otic nerves from the anterior opening of the pars jugularis passed upwards into the sphenotic through several elongated foramina. Medial to the anterior opening of the pars jugularis a large foramen transmitted the superficial ophthalmic nerves, the profundus, and probably a mandibular branch of the facial or the trigeminal. The superficial ophthalmic nerves passed dorsally on to the face of the pleurosphenoid where their course is marked by a groove. A further small foramen in the hind wall of the orbit dorso-medial to the other foramina may also have transmitted super- ficial ophthalmic nerves. The oculomotor passed through a foramen lying ventro- lateral to the suture between the basisphenoid and the prootic. soc par 20mm Fig. a. Apateodus striatus Woodward. Neurocranium in posterior view, collection of the Institute of Geological Sciences, number 26241. From the The exoccipitals meet in the mid-line on the posterior face of the neurocranium and enclose the foramen magnum. Each exoccipital forms part of the occipital condyle together with the basioc
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