. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Parasphenoid of a Palceoniscoid. 423 Coming now to the posterior expanded part of the bone, we find on the centre line of the specimen, and immediately behind the posterior termination of the shaft and wings, a distinct, rounded, slightly oval depression, which is marked out by a definite raised rim, broken in part by splintering of the bone. This pituitary region—depression and rim— is even better marked out in the cast C of this dorsal surface. By the side of the pituitary d
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Parasphenoid of a Palceoniscoid. 423 Coming now to the posterior expanded part of the bone, we find on the centre line of the specimen, and immediately behind the posterior termination of the shaft and wings, a distinct, rounded, slightly oval depression, which is marked out by a definite raised rim, broken in part by splintering of the bone. This pituitary region—depression and rim— is even better marked out in the cast C of this dorsal surface. By the side of the pituitary depression we have the right anterior lateral process preserved, passing outwards and very Fiff. [ Dorsal view of the compound para-basispuenoid bone of Rhadinichthys monensis. (Specimen A.) X 7*6 diams. No. L 10820. M. M. slightly forwards. This process is apparently of the nature of a thick flange of bone, constricted near the base, rounded off at its outer and rather wider extremity, and bearing on its dorsal surface two or three well-defined ridges. The corresponding process of the left side is cut off by the broken edge of the rock, whilst the posterior pair of processes is also missing. A broad well-defined ridge runs outwards and backwards on each side from the region of the pituitary depression, and the whole of the expanded region of the bone posterior to. 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 London, Taylor and Francis, Ltd
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
