On the vomer in man and the mammalia, and on the sphenoidal spongy bones / by John Cleland.

  • Cleland, John, 1835-1924.
Date:
[between 1800 and 1899]
Catalogue details

Licence: Public Domain Mark

Credit: On the vomer in man and the mammalia, and on the sphenoidal spongy bones / by John Cleland. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    the two ascending processes of the palate bone, and completes by a point in its inferior margin the almost perfect nasal foramen of that hone. The sphenoid process of the palate- hone lies between the ethmo-vomerine laminae and the ptery- goid bone. The central plate of the ethmoid does not at all touch the vomer in early life, but the cartilaginous septum of the nose passes back beneath it to the presphenoid bone. It may be mentioned at once that the nasal foramen of the palate bone is completed by the ethmoid in all the animals examined. The relations of the vomer in the fox and the pig are the same as in the cat. In the case of the hedgehog, as in the sheep, it does not articulate with the palate bones. In the horse also it does not articulate with the palate bones. But the superior connections of the vomer in the horse are peculiar, inasmuch as the inferior surface of the leaflets of the ethmoid, instead of lying in contact, as is usual, with the ethmo-vomerine lamina for a considerable extent, is completely floored in by the upper part of the palate bone, which is expanded for that purpose. Even in the horse, however, a slender lamina, im- mediately in front of the palate bone, and in contact with its nasal foramen, passes downwards and inwards on each side from the framework of the ethmoidal turbinations to the mar- gin of the vomer; but the vomer and it are not anchylosed until other sutures also have begun to be obliterated. The vomer in the rodenlia is remarkable in having very little tendency to come in contact with the superior maxilla- ries. As far as I have observed, it is always continuous with the lateral masses of the ethmoid. In the skull of the rabbit there is only one great anterior- palatine foramen; for, although the mesial processes of the intermaxillaries project well backwards, the palate plates of the superior maxillaries do not come far enough forwards to meet them. The vomer does not at all approach the superior maxillaries; its posterior margin terminates inferiorly in a thickened angle, which articulates with the intermaxillaries in such a manner as to make their inferior aspect continuous with the posterior margin of the vomer. In front of this, the laminae bounding its groove are prolonged on the upper