nemfrog:
“The part of the eye in humans called the “semilunar fold” is a vestigial nictitating membrane or third eyelid, found in the owl and the horse. Introduction to evolution. 1962.
Internet Archive
”

nemfrog:

The part of the eye in humans called the “semilunar fold” is a vestigial nictitating membrane or third eyelid, found in the owl and the horse. Introduction to evolution. 1962.

Internet Archive

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