. Bulletin of the British Museum (Natural History), Geology. 156 A REVIEW OF UPPER JURASSIC PLIOSAURS but in order to give a full account in one place of the diagnostic features of the genus Pliosaurus, a description of a scapulae of the kind belonging to Pliosaurus brachyspondylus is given below. This type of scapula is a triradiate bone with a strong, thickened, glenoid ramus which bears a facet for the articulation of the coracoid, and another which forms the anterior part of the glenoid cavity. Medially the scapula thins out and is expanded into a broad flat sheet termed the ventral plate.
. Bulletin of the British Museum (Natural History), Geology. 156 A REVIEW OF UPPER JURASSIC PLIOSAURS but in order to give a full account in one place of the diagnostic features of the genus Pliosaurus, a description of a scapulae of the kind belonging to Pliosaurus brachyspondylus is given below. This type of scapula is a triradiate bone with a strong, thickened, glenoid ramus which bears a facet for the articulation of the coracoid, and another which forms the anterior part of the glenoid cavity. Medially the scapula thins out and is expanded into a broad flat sheet termed the ventral plate. Laterally there is a further extension—the dorsal process which is approxi- mately the same width as the glenoid ramus and which again forms a thin sheet. The dorsal process projects either laterally or postero-laterally and in ventral view is set off at an angle to the plane of the bone, from a ridge which extends to the anterior point of the ventral plate from the glenoid cavity. Immature scapulae of a similar kind are also known (Lydekker, 18896 : 122) but there is no way of ascer- taining their specific identity. They clearly belong to Pliosaurus and they are of. 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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