. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WATSON : BOLOSAURUS AND REPTILE CLASSIFICATION 375 though it is separate from it in most. In all probability the dor- sum sellae turcica is entirely prootic but the lower part of the wide, long and much overhung pituitary fossa is certainly basi- sphenoid. This bone therefore forms part of the posterior surface of the fossa extending outward lateral to it to form the core, at SOc. ^^ Fig. 19. Diadectes, the brai".ease seen from in front, the roof of the skull, parasphenoid and do
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WATSON : BOLOSAURUS AND REPTILE CLASSIFICATION 375 though it is separate from it in most. In all probability the dor- sum sellae turcica is entirely prootic but the lower part of the wide, long and much overhung pituitary fossa is certainly basi- sphenoid. This bone therefore forms part of the posterior surface of the fossa extending outward lateral to it to form the core, at SOc. ^^ Fig. 19. Diadectes, the brai".ease seen from in front, the roof of the skull, parasphenoid and dorsum sellae cut through transversely. Composite and a different reconstruction from Figures 17, 18, etc. About natural size. Reference letters as before with: , facet for articulation of the upper end of the epipterygoid with the skulProof; , attachment of the external rectus muscle to tlie basisphenoid ; , internal auditory meatus; , pituitary fossa; , prootic; , articular head of the quadrate in pit on the prootic; ; quadrate condyle; VI and' VII, cranial nerve foramina. any rate, of the short, massive basipterygoid process, which is rounded from back to front on its lower surface and extends somewhat upwards laterally to the fossa. The floor of the pitu- itary fossa has a low median ridge and ends at a transverse line,. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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