. On the anatomy of vertebrates [electronic resource] . ransverse processes,and the seventh cervical for the absence of the pleurapophysisand the sudden increase in the length of the neural spine. Thisis far surpassed by the spines of the anterior dorsal vertebrae;after which those processes progressively decrease in height tothe last three dorsals, where they gain in antero-posterior extent :the verticality of the spine of the eleventh dorsal indicates the SKELETON OF AETTODACTYLA. 4-39 centre of motion of the trunk. The dorsal neurapophyses arcdirectly perforated by the sj)inal nerves, and a
. On the anatomy of vertebrates [electronic resource] . ransverse processes,and the seventh cervical for the absence of the pleurapophysisand the sudden increase in the length of the neural spine. Thisis far surpassed by the spines of the anterior dorsal vertebrae;after which those processes progressively decrease in height tothe last three dorsals, where they gain in antero-posterior extent :the verticality of the spine of the eleventh dorsal indicates the SKELETON OF AETTODACTYLA. 4-39 centre of motion of the trunk. The dorsal neurapophyses arcdirectly perforated by the sj)inal nerves, and a bar of bone con-nects the end of the diapophysis with the hind part of the cen-trum, circumscribing a vertical perforation on each side. Themetapophysis commences as a tuberosity upon the diapophysis ofthe middle dorsal vertebrae, projects forward midway between thedi- and prozyg-apophyses in the tenth, passes upon the prozyg-apophyses of the eleventh dorsal, and is continued in that positionthroughout the lumbar series. There are no anapophyses. 307. Dromedary. In the Dromedary, fig. 307, and Camel (Camelus bactrianus),the vertebral formula is:—7 cervical, 12 dorsal, 7 lumbar, 4 sacral,and 18 caudal. Seven pairs of ribs articulate directly with thesternum, which Consists of six bones, the last being greatly ex-panded and protuberant below, where it supports the pectoralcallosity in the living animal. The cervical region is remarkablefor its length and flexuosity; the vertebrae are opisthocoelian,but resemble those of Macrauchenia in the absence of the perfo-ration for the vertebral artery in the transverse process, with theexception of the atlas; that artery, in the succeeding cervicals,enters the back part of the neural canal, and perforates obliquely 460 ANATOMY OF VERTEBRATES, the fore part of the base of the neurapophysis, as shown in thelongitudinal section, fig. The costal part of the transverseprocess is large and lamelliform in the fourth to the sixth cervical
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