The parents of these unfortunate persons were perfectly healthy, as were the rest of their family.

Cruveilhier cites a case of a girl of eleven who had absolutely no cerebellum, with the same symptoms which are characteristic in such cases.

There is also recorded the history of a man who was deficient in the corpus callosum; at the age of sixty-two, though of feeble intelligence, he presented no signs of nervous disorder.

Claude Bernard made an autopsy on a woman who had no trace of olfactory lobes, and after a minute inquiry into her life he found that her sense of smell had been good despite her deficiency.
Buhring relates the history of a case somewhat analogous to viability of anencephalous monsters.

It was a bicephalous child that lived thirty-two hours after he had ligated one of its heads.
{footnote} The argument that the brain is not the sole organ of the mind is in a measure substantiated by a wonderful case of a decapitated rooster, reported from Michigan.