Spontaneous malformations in squirrel monkey [Saimiri sciureus] fetuses with emphasis on cleft lip and palate.

Gross examination of a group of surviving and nonsurviving squirrel monkeys has revealed a high incidence of cleft lip and cleft primary palate defects with an associated anophthalmia. These defects, as well as single incidences of diaphragmatic aplasia, scoliosis, internal hydrocephalus, and funnel chest, are noted or described and discussed with reference to sex and parentage.