. The Bible and science. he sauropsidae, in having askull united to the vertebral column by a singlejoint, or condyle, as it is termed, while in amphibiaand vertebrata there are two condyles. The jaw in reptiles is composed of several pieces, andunited to the skull by a special bone called the quadratebone—an arrangement which gives them power to opentheir jaws to an enormous width. There are generallyfour extremities, although sometimes, as in snakes,these may be absent, and the skin is covered withscales or bony plates. The heart generally containsthree chambers, two auricles and one ventric
. The Bible and science. he sauropsidae, in having askull united to the vertebral column by a singlejoint, or condyle, as it is termed, while in amphibiaand vertebrata there are two condyles. The jaw in reptiles is composed of several pieces, andunited to the skull by a special bone called the quadratebone—an arrangement which gives them power to opentheir jaws to an enormous width. There are generallyfour extremities, although sometimes, as in snakes,these may be absent, and the skin is covered withscales or bony plates. The heart generally containsthree chambers, two auricles and one ventricle. In the first order, that of the lizards, or Lacertilia,there are generally two pairs of distinct limbs, andeven when these limbs are not developed, as in thecommon blindworm, which looks like a snake, there REPTILIA—LIZARDS- -CROCODILES—SNAKES. 195 is always a scapular arch present, and they have alwayseyelids. They never have teeth Avith distinct the next order, that of the Crocodilia, the teeth are. Fig. 98.—Lizard. always planted in distinct, separate sockets, and theskin is partly covered by horny scales and partly bylarge bony plates.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectnaturalhistory, booky
