. The structure and life of birds. Birds; Evolution. II SKELETONS OF BIRD AND REPTILE 23 latter is a ball-and-socket. At the hinder end of each vertebra there is a protuberance, rounded on its upper side but nearly flat below, which fits into a hollow in the vertebra behind. The fact that the protuberance is. Fig. 7.—(W) Two vertebrx of Snake. (B) Two neck o( I. Anterior end. II. Posterior. n, bail ; CR, cervical rib; SD, " saddle " ; SK, socket ; si", spine ; ^'A, tunnel throiigll which verteljral artery passes. not a perfect ball but has its underside flatte
. The structure and life of birds. Birds; Evolution. II SKELETONS OF BIRD AND REPTILE 23 latter is a ball-and-socket. At the hinder end of each vertebra there is a protuberance, rounded on its upper side but nearly flat below, which fits into a hollow in the vertebra behind. The fact that the protuberance is. Fig. 7.—(W) Two vertebrx of Snake. (B) Two neck o( I. Anterior end. II. Posterior. n, bail ; CR, cervical rib; SD, " saddle " ; SK, socket ; si", spine ; ^'A, tunnel throiigll which verteljral artery passes. not a perfect ball but has its underside flattened limits the freedom of movement, and, in addition to this, each vertebra bears a spine (SP, fig. I) upon the top, the spine of one being very near to that of the next, and thus a further limit is put to movement up and down. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Headley, F. W. (Frederick Webb), 1856-1919. London, New York, Macmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1895
