Microcephaly, anencephaly and hydrocephaly; spina bifida, shown in situ and in isolation, in 8 numbered illustrations. 1 illustration of neonate head, skull cap removed to show microcephaly, anencephaly, antero-lateral view. 3 illustrations of brain of anencephalic child, shown in isolation, showing cerebellum with reduced cerebrum and optic chiasm. 1 illustration of cranial fossa of neonate with hydrocephalus, superior view. 1 illustration of spina bifida, showing back, buttocks and meningomyelocele, posterior view.