On the anatomy of vertebrates (electronic resource)

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Identifier: b20416039_002 (find matches)
Title: On the anatomy of vertebrates (electronic resource)
Year: 1866 (1860s)
Authors: Owen, Richard, 1804-1892
Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds
Publisher: London : Longmans, Green
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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cepsextensor cruris, and the fabellas in the tendinous origins of thegastrocnemii, are present in most Insectivora. The os penis isalso found in this order. § 183. Skeleton of Bruta. — A. Vertebral Column. — In theloricate or Armadillo family this is remarkable for the pre-valence of anchylosis in unusual parts, e. g. the cervical region,and throughout the dorso-lumbar regions in the great extinctGlyptodonts, which have their cuirass in one piece. In the Nine-banded Armadillo (Dasypus Peha, fig. 260), thevertebral formula is:—7 cervical, 10 dorsal, 5 lumbar, 8 sacral,and 16 caudal. The spine of the dentata is compressed, lofty, anddeveloped backward beyond those of the third and fourth cervicals,with which it has partially coalesced : a corresponding coalescencehas taken place between the bodies of these vertebras, which areunusually broad and flat below. The diapophysial part of thetransverse processes of the last cervical abuts against the tubercle 394 ANATOMY OF VERTEBRATES.
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ward in front of the same rib. The last three cervicals, ib. C,have no spinous processes ; that of the first dorsal rises to aconsiderable height, and those of the remaining dorsals, d, andlumbar vertebras, L, attain the same horizontal line. The meta-pophysis is first fully developed upon the seventh dorsal, and pro-gressively elongates to the last lumbar, fig. 261, m: it presents261 an articular surface at the under and fore part of itsbase to be articulated withthe anapophysis of the ante-cedent vertebra. The ana-pophyses increase in thick-ness rather than in length inthe succeeding vertebras, andupon the last dorsal present anarticular surface at their underpart for connection with a pa-rapophysis, ib. p. These ac-cessory joints coexist with theordinary articulations between the anterior and posterior zygapo-physes, and there are consequently twelve joints between eachpair of vertebras, in addition to the ligamentous one between thebodies of the vertebras, ib. c. This mechanism is

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