. On the theory and practice of midwifery . apes. The os coccygis resemblesa tail, bent forward, and of considerable size. The forehead is more vaulted, because of the development of thehemispheres of the brain; the spinal cord is cylindrical, of nearly uni-form thickness, and terminating in a blunt extremity; posteriorly it isopen. The medulla oblongata makes a bend forwards at the top ofthe neck, and then ascends perpendicularly into the capacious cranium,where the corpora quadrigemina present themselves; as two large semi-globular masses, having behind them a pair of narrow lateral laminae,
. On the theory and practice of midwifery . apes. The os coccygis resemblesa tail, bent forward, and of considerable size. The forehead is more vaulted, because of the development of thehemispheres of the brain; the spinal cord is cylindrical, of nearly uni-form thickness, and terminating in a blunt extremity; posteriorly it isopen. The medulla oblongata makes a bend forwards at the top ofthe neck, and then ascends perpendicularly into the capacious cranium,where the corpora quadrigemina present themselves; as two large semi-globular masses, having behind them a pair of narrow lateral laminae, therudiments of the cerebellum. The medullary stem or eras cerebri passesunder the corpora quadrigemina, and again bending downwards, the cor-pora striata and optic thalami are evolved upon it. l2 126 UTERO-GESTATION. The first points of ossification appear about the seventh week, in theclavicle and lower jaw; the vertebral arches are not yet closed in, andthe ribs appear like little streaks. The only trace of muscular fibre is m Fig. Fig. 56.
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