Combettes reports the case of a girl who died at the age of eleven who had complete absence of the cerebellum in addition to other minor structural defects; this was probably the case mentioned by Cruveilhier.
Diminution in volume of the head is called microcephaly.

Probably the most remarkable case on record is that mentioned by Lombroso.

The individual was called "l'homme-oiseau," or the human bird, and his cranial capacity was only 390 c.c.Lombroso speaks of another individual called "l'homme-lapin," or man-rabbit, whose cranium was only slightly larger than that of the other, measuring 490 mm.

in circumference.

Castelli alludes to endemic microcephaly among some of the peoples of Asia.