In these animals, the subarcuate fossa houses a part of the cerebellum, the petrosal lobe.
2.
Above and between these two openings is an irregular depression that lodges a process of the dura mater and transmits a small vein; in the infant, this depression is represented by a large fossa, the subarcuate fossa, which extends backward as a blind tunnel under the superior semicircular canal.
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