. The comparative anatomy of the domesticated animals. Veterinary anatomy. 72 TEE BONES. ^-1f^^^»^ SHOULDER. In solipeds, tliis region has for its base a single bone, tlie sccqmla or omojylat. Scapula. This is a flat, triangular, and asymmetrical bone, prolonged at its superior border by a flexible cartilage, articulated interiorly with the humerus only, and applied p,„ 40 against the lateral plane of the thorax in an oblique direction downwards and forwards. It has two faces, three borders, and three angles. Faces.—The external face is divided by the scapular or acro- mian spine, into two cav
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 72 TEE BONES. ^-1f^^^»^ SHOULDER. In solipeds, tliis region has for its base a single bone, tlie sccqmla or omojylat. Scapula. This is a flat, triangular, and asymmetrical bone, prolonged at its superior border by a flexible cartilage, articulated interiorly with the humerus only, and applied p,„ 40 against the lateral plane of the thorax in an oblique direction downwards and forwards. It has two faces, three borders, and three angles. Faces.—The external face is divided by the scapular or acro- mian spine, into two cavities of iniequal width—the supra and infraspinous (or antea and postea spinatus)fossse. The spine is a very salient crest which runs the whole length of the external scapular surface; very elevated in its middle part, which shows au ia-regular enlargement—the tube' rosity of the spine —it insensibly decreases towards its two ex- tremities. The supraspinous fossa, the narrowest, is situated above, or rather in front of the spine; it is regularly concave from side to side, and perfectly smooth. The infraspinous fossa is twice the width of the pre- ceding, and occupies all the sur- face behind the spine. It ex- hibits: 1, Below, and near the posterior border, several rows of roughened lines for muscular insertion ; 2, Near the neck, the nutritious foramen of the bone, and some vascular grooves. The internal face is excavated in its centre to form a hollow called the subscapular fossa, which is prolonged superiorly by three diverging points. The median point extends to the suj^erior border of the bone, and separates two roughened triangular surfaces destined for muscular implantation. Borders.—The superior is indented by an irregular groove to receive the inferior margin of the cartilage of prolongment. The latter is convex on its superior border, extends beyond the posterior angle of the bone, and gradually diminishes in thickness as it leaves its point of attachment
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