File:On the anatomy of vertebrates (electronic resource) (1866) (14568730299).jpg

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:
of the neck, and favour-able to strength, may be discerned in the principal laminae. Inthe head of the tibia, B, the compact tissue is also very thin,where it encloses the reticular structure occupying the proximalend, and becomes thicker as that structure is absorbed. In boththe tibia and fibula is shown the line indicative of the union ofthe upper c epiphysis with the f shaft: and in the femur thereis a similar indication of the epiphysial condition of the greattrochanter. The more constant sesamoid bones of the Human skeleton, 1 For the details of a comparison of the limb-bones of Man with those of the Apes,see cm-, vol. v. p. 1, pis. i.-xih. SKELETON OF BIMANA. 581 which have an articular facet playing upon a joint, are thee patella/ fig. 183, 66, the pair beneath the metatarso-phalangialjoint of the great toe, and the pair at the corresponding part ofthe thumb. Of those playing on surfaces of bone, there is one inthe tendon of the peroneus longus which glides on the groove of 402
Text Appearing After Image:
Sections of A femur, B tibia, and fibula. the cuboid; one in the tendon of the tibialis anticus opposite thesmooth facet on the entocuneiform; one in the tendon of thetibialis posticus opposite the inner side of the astragalus; andone (fabella) in the outer head of the gastrocnemius behind theouter condyle of the femur. The os penis, common in Quadru-raana, is never developed in Man. D. Relations to Archetype.—Finally, in regard to the skeletonof Bimana, there remain a few observations on its relations to thegeneral vertebrate archetype (vol. i. fig. 21), from which it de-parts so widely. The skull shows the following extreme modifications. In theoccipital segment the haemal arch is detached and displaced, as inall Vertebrates above fish; its pleurapophysis (scapula, fig. 403,pi, 5i) has exchanged the long and slender for the broad and flatform; the haemapophysis (coracoid, 52) is rudimental, and coalesceswith 51: the diverging appendage, 53-57, of this arch becomes the6 pectoral li

Note About Images