Lessons in elementary anatomy / by St. George Mivart.

  • St. George Jackson Mivart
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: Lessons in elementary anatomy / by St. George Mivart. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    be considered as the precursor of the axial system, and the parts of such lamellae as foreshadowing the future carti- laginous and bony complexities which come ultimately to occupy parts of the areas of such lamellae. Such com- plexities are the most complete expression known to us of the axial skeleton, as the membranous lamellae are its most imperfect and undifferentiated form. The parts of the axial skeleton may be tabulated as follows : — /•Neural spines. / Prorj'gapophyses. I I Postzygapophyses. I I Metapophyses. VNeiiral arches . . . • ( Anapophyses. I Hyperapophyses. I Zygantrum. ' Zygosphene. Central Bodies of verte brae (or noto- chord). Epaxial . Paraxial j'Diapophyses—upper ribs. ] Parapophyses—lower ribs V and sternum Hypaxial 'Hypapopliyses(eitber sin- gle or forked, or as de- tached chevron bones). Splanchnapophyses Ventral boundary of the heart-sac, never ossified or chondrified. \ Trabeculje. Mandible. Cornicula and hyoid. Cornua and hyoid. Branchial arches. We may now specially consider the anterior end of the axial skeleton, reviewing the structure of man's skull m the light afforded by the study of other annuals. That division which was made at startmg between the skeleton of the face and of the brain-case now appears to have l5een both true and significant. All the face and both jaws arc. we have seen, ossifications around the anterior splanchnapophyses, and arc but of small size compared with the same parts as developed even m some members of man's own class ...C'.. the ^Y^f' over we have seen that sucli parts m limi are but mere rudi- menls of what may be developed in other annuals as is made manifest in Fishci. with their largely clcvelnped branchial skeleton and complex suspensonal apparatus foi thcjaxvs.
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