. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. MARSUPIALIA. 281. Scapula of Koala. Fig. 106. curve, the convex pos- terior position of which varies as to its degree and extent. The subscapular sur- face is remarkable in the Perameles for its flatness, but presents a shallow groove near the inferior costa. In most other Marsupials it is more or less convex or undulat- ing. In the Great Kangaroo the supra-spinal fossa is of less extent than the space below the spine, and the spine is inclined up- wards. In the Perameles and Dasyures the proportions of the supra and inf
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. MARSUPIALIA. 281. Scapula of Koala. Fig. 106. curve, the convex pos- terior position of which varies as to its degree and extent. The subscapular sur- face is remarkable in the Perameles for its flatness, but presents a shallow groove near the inferior costa. In most other Marsupials it is more or less convex or undulat- ing. In the Great Kangaroo the supra-spinal fossa is of less extent than the space below the spine, and the spine is inclined up- wards. In the Perameles and Dasyures the proportions of the supra and infraspinal sur- faces are reserved, and the whole spine is bent downwards over the infraspinal surface. In the Potoroos and Phalangers the acromion is, as it were, bent downwards so as to present a flattened surface to the observer. In the Potoroos and Opossums this appear- ance is produced by a true expansion of the acromion. In the Perameles the coracoid process is merely represented by a slight pro- duction of the superior part of the glenoid ca- vity. In the Kangaroo and Potoroo it forms a protuberance on the upper part of the head of the scapula. In the other Marsupials it as- sumes the character of a distinct process from the same part, and attains its greatest develop- ment in the Wombat and Koala, in the latter of which it is forcibly curved downwards and inwards. The clavicles are present in all the Marsu- pials, with the exception of the genus Pera- meles, and probably also the Charopus. In the claviculate Marsupials they are relatively strongest and longest in the burrowing Wom- bat, weakest and shortest in the Great Kanga- roo. In the latter they are simply curved with the convexity forwards, and measure only two inches in length. In the Wombat they are upwards of three inches in length, and have a double curvature; they are expanded and obliquely truncate at the sternal extremity, where the articular surface presents a remark- ably deep notch : they become compresse
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