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Examples
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From here a narrow duct, called "the aqueduct of Sylvius," passes through the corpus quadrigeminum to the third cerebral ventricle, which lies between the two optic thalami; and this in turn is connected with the pairs of lateral ventricles which lie to the right and left in the large hemispheres.
The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876
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Although this quadrigeminum is very insignificant in man and the higher mammals, it forms a special third section, greatly developed in the lower vertebrates, the "middle brain."
The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876
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Behind these parts we find, between the cerebrum and cerebellum, a small ganglion composed of two prominences, which is called the corpus quadrigeminum on account of a superficial transverse fissure cutting across (Figures 2.290 m and 2.291 v).
The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876
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