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The epiphysis, or pineal body, is quite as degenerate as in mammals, although still forming a long stalk as in reptiles.

The superior pair of these bodies is overlapped by the pineal body and forms part of the lower visual centres.

A similar reminiscence is found in the pineal body, a small and useless object, about the size and shape of a hazel-nut, in the centre of the brain.

At the posterior end of this is the pineal body, which the section has just escaped.

From its broad anterior end two white bands, the peduncles of the pineal body, pass forward, one on the inner side of each optic thalamus.