; order Squamata, suborder Serpentes)
A family of primitive burrowing snakes that have a small, rigid skull with teeth only on the upper jaw. The eyes lie beneath scales. The body is worm-like, with a short tail, often ending in a spine. A rudimentary pelvis is present. The scales are small (not enlarged ventrally). There are about 200 species, found in the Old and New Worlds, and Australia.
Subjects: Zoology and Animal Sciences.