. The Bible and science. , and being prolonged by the bent bones termedribs, which are jointed on to them, together form asecond, but less perfect canal, in which the vascularsystem is contained, and which is consequently termedthe haemal canal. The vertebrates thus consist of a double canal, theneural and the haemal, whereas all the other classeshave but the simple canal in which the nervous andvascular systems are contained in common. At the anterior end of the spine, the vertebraeundergo a strange alteration, their parts being so ex-panded and modified as to form a bony case, theskull, whic
. The Bible and science. , and being prolonged by the bent bones termedribs, which are jointed on to them, together form asecond, but less perfect canal, in which the vascularsystem is contained, and which is consequently termedthe haemal canal. The vertebrates thus consist of a double canal, theneural and the haemal, whereas all the other classeshave but the simple canal in which the nervous andvascular systems are contained in common. At the anterior end of the spine, the vertebraeundergo a strange alteration, their parts being so ex-panded and modified as to form a bony case, theskull, which protects that collection of nervous matterwhich is known as the brain, and also to form organsfor the seizure and mastication of food. In addition to this we have two bony girdles,partially encircling the body at two points. The firstis called the shoulder-girdle, and its position is ir,6 SHOULDER AND PELVIC GIRDLES. implied in its name. The second is called the pelvicgirdle, and is situated at the loins of the Fin. Sl.—.lfn. tlip mandible or lower jaw ; CI. ihe cavicle, or collar lione; 77. tlioImmpriis; Sep. the scapula, or shoulder blade; St. the sternum ; R the carti-lages of tlie ribs ; R, the ribs ; II, the ilium or hip-bone ; F, the femur. Each of these girdles consists of several bones,which form the limbs of the animal, and unite them SCAPULA AND ILIUM. IG to the trunk. We have in each girdle two largeflat bones, which serve as an attachment for themuscles which move the limbs. These in the shoulder-
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