. The Cambridge natural history. Zoology. Fig. 17.—A, First thoracic skeletal segment for comparison witli B, fifth cervical vertebra (Man), , Body of vertebra ; c, first thoracic rib ; c, cervical rib (which has be- come united with the transverse , tr), the two enclosing the costo-transverse foramen {) ; sf, sternum ; zy, articular process of the arch (zygapophysis). {From Wiedersheim's Structure of Man.) it is the first rib alone which is so attached. As a rule, to which the Whales mentioned are again an exception, the rib is divided into at least two regions—the vertebral p
. The Cambridge natural history. Zoology. Fig. 17.—A, First thoracic skeletal segment for comparison witli B, fifth cervical vertebra (Man), , Body of vertebra ; c, first thoracic rib ; c, cervical rib (which has be- come united with the transverse , tr), the two enclosing the costo-transverse foramen {) ; sf, sternum ; zy, articular process of the arch (zygapophysis). {From Wiedersheim's Structure of Man.) it is the first rib alone which is so attached. As a rule, to which the Whales mentioned are again an exception, the rib is divided into at least two regions—the vertebral portion which is always ossified, and the sternal moiety which is usually cartilaginous. This is, however, often very short in the first rib. They are, however, ossified in tlie Armadillos and in some other animals. Between the vertebral and sternal portions an inter- mediate tract is separated off and ossified in the Monotremata. The ribs of existing mammals belong only to the dorsal region of the vertebral column, but there are traces of lumbar ribs and also of cervical ribs. In the Monotremata, indeed, these latter. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
