. A manual of zoology. 494 MANUAL OF ZOOLOGY SECT. The thoracic vertebne all have elongated spines. The transverse processes are short and stout ; each bears near its extremity a small, smooth articular surface or tubercular facet for the tubercle of a rib. On the anterior and posterior borders of each vertebra is a little semi-lunar facet, the capitular facet, situated at the junction of the centrum and the neural arch. The two contiguous semi-lunar facets of successive vertebrae form between them a cup-like concavity into which the head or capitulum of a rib is Bsp SW °<* art \
. A manual of zoology. 494 MANUAL OF ZOOLOGY SECT. The thoracic vertebne all have elongated spines. The transverse processes are short and stout ; each bears near its extremity a small, smooth articular surface or tubercular facet for the tubercle of a rib. On the anterior and posterior borders of each vertebra is a little semi-lunar facet, the capitular facet, situated at the junction of the centrum and the neural arch. The two contiguous semi-lunar facets of successive vertebrae form between them a cup-like concavity into which the head or capitulum of a rib is Bsp SW °<* art \ ^^^Vi Fig. 298. — Lepus cuniculus. A, atlas and axis, ventral aspect, od, odontoid pro- cess nf axis. B, lateral view of axis, art, articular facet for occipital condyle; 0<Z*, odontoid process; pt. zy, post-zygapophysis; sp, neural spine. C. thoracic vertebras, lateral view, cent, centrum; fac, facet for rib; met, metapophysis; pr. zy, prezygapophysis; pt, zy, post-zygapophysis; rb, rib: sp. spinous process. In the lumbar region the spines are comparatively short, and both transverse processes and bodies are devoid of facets. The sacral vertebrae are firmly ankylosed together to form a single composite bone, the sacrum. The first and second bear great expanded lateral plates — sacral ribs — with roughened external surfaces for articulation with the ilia. Of the caudal vertebrae the more anterior resemble those of the sacral region and have similar processes; but as we pass backwards in the caudal region all the processes gradu-. 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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