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

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
apophysis of eachdorsal vertebra, increasing in length to the two last, in which ithas an independent origin. The metapophysis is suddenly de-veloped from the tenth dorsal, and presents an articular surfaceto a second facet on the outer side of the hinder zygapophysis ofthe vertebra in front. The anapophyses continue to be developedfrom all the lumbar vertebrae, progressively decreasing as theseapproach the sacrum, and appearing in the last as a mere ridge 518 ANATOMY OF VERTEBRATES. on the upper part of the base of the diapophysis. The homotypalridge may be recognised on the first sacral vertebra. There arerudiments of hypapophyses on the middle caudal vertebrae.Seven pairs of ribs articulate with the sternum, which consists ofseven bones and an ensiform cartilage. The transverse processof the atlas is perforated lengthwise and vertically by the verte-bral artery; which afterwards pierces the neural arch : the neuralspine is represented by a small tubercle, and there is a hypapo- 344
Text Appearing After Image:
Mandrill. (Papis Maimon.) lxix-. physial ridge. The centrum of the axis is much produced back-ward, underlapping that of the third vertebra: this character isgradually lost in the succeeding vertebrae : the transverse processof the axis ends in two tubercles. The lower (pleurapophysial)division of the process is compressed in the third cervical, and be-comes developed into a plate, progressively increasing, and dis-proportionately so in the sixth cervical: it is absent in theseventh cervical, the transverse process of which is, however,still perforated by the vertebral artery. The neural spines are SKELETON OF QUADRUMANA. 519 simple, and increase in length from the third to the seventhcervicals. Those of the dorsal vertebrae are longer and stronger,but diminish in length as they approach the loins : that of thetenth indicates the centre of motion of the trunk. In the Pig-tailed Macacque (Macacus nemestrinus), the atlashas a strong hypapophysis, but no neural spine or tubercle: thetran

Note About Images