The myology of the upper and lower extremities of Orycteropus capensis / by John Charles Galton.

  • Galton, John Charles, 1840-
Date:
[1868]
Catalogue details

Licence: Public Domain Mark

Credit: The myology of the upper and lower extremities of Orycteropus capensis / by John Charles Galton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    the assistance of a skeleton at hand, from the lumbar aponeurosis, from the spines of the first nine dorsal vertebrse, and from the nuchal ligament, being covered at the highest point of origin, as Prof. Humphry remarks', by the retractor auris. Its anterior half is inserted fleshy into the upper edge of the anterior half of the scapular spine, being almost continued here into the scapular division of the deltoid, and having a small layer of fibres detached from its inferior surface to he inserted into the fascia covering the supraspinatus muscle. The rest of the trapezius radiates towards an irregularly oval aponeurosis, which is inserted into the hroadened-out tubercle or facet developed midway upon the spine of the scapula. The most anterior inserted portion of the muscle is in intimate relation with the terminal part of the acromio-basilar. The trapezius has no clavicular insertion whatever. Omo-Jiyoid.—This muscle, as was the case in Basypus, is absent. Prof. Humphry makes no remark concerning either its presence or absence; nor is it figured by Cuvier. Cuvier does not mention this muscle when describing the hyoidean myology in Basypus. He says, however, that in the Sloths it is entirely absent (“ manque tout- a-fait ”^) It is remarked in Cuvier’s ‘Le9ons’® that the omo-hyoids are wanting in the Sloths. They are described in the Anteater; but no mention is made of either their presence or absence in the Armadillo. Prof. Owen, in his description of the muscles of the tongue of the Great Anteater, makes no mention of this muscleh I conclude, therefore, that it is absent in this animal. The lerator claviculce, which was present in the Armadillo, is absent in Orycteropus. Sterm-mastoid.—The bulk of this muscle had its ordinary origin from the mastoid process of the temporal bone, and was inserted along the upper edge of the manubrium sterni. On its middle third rested the principal lobe of the submaxillary gland. Another and smaller section of the muscle took origin, or was inserted, along the whole of the middle line of the manubrium, meeting with its fellow of the opposite side— an arrangement similar to that in the Armadillo. It then ran along the outer edge of the first-described section of the muscle, fusing with it, but on reaching the upper part of the neck was separated from it by the jugular vein, which passed between. At the root of the ear it terminated, serving as a kind of depressor auris—an arrangement very clearly represented by Cuvier in one of his plates®. The cleid^o-mastoid, which rises beneath the above, from the mastoid process, rmis along on its outer side for the greater part of its course, but, finally diverging, is inserted into the sternal half of the clavicle. Suhclavius.—This is a very well developed muscle, taking origin from the manubrium of the sternum, and from the junction of the first rib with tliis bone—in part, too, by * Loc. cit. p. 298. ^ Anat. Comp. vol. viii. p. 563. ® 2nd edit. Paris, 1835, tome iv. 1® partie, p. 490. *’ “ On the Anatomy of the Great Anteater,” Trans. Zool. Soe. «Tuly 1854. ® Op. cit. pi. 255.