136 THE SKELETON. foramina. From this eminence, the superior division of the crucial ridge runs * upward to the superior angle of the bone; it presents occasionally a deep groove for the superior longitudinal sinus, the margins of which give attachment to the falx cerebri. The inferior division,… … posterior margin of the foramen magnum, on the edge of which it becomes gradually lost; this ridge, which is bifurcated below, serves for the attachment of the falx cerebelli. It is usually marked by two small grooves, which com- mence on either side of the posterior margin of the foramen magnum,…
Human anatomy
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