Amphisbaenids are also known as "worm lizards." They are uncommon in the pet trade, but I have seen a few. They can be quite attractive.

Amphisbaenian links:

Herpetological publication links (PDF):

Navas, et al. 2004. Morphological and physiological specialization for digging in amphisbaenians, an ancient lineage of fossorial vertebrates. J Exp. Biol. 207: 2433-41.

Vanzolini. 2002. An aid to the identification of the South American species of Amphisbaena (Squamata, Amphisbaenidae). Papeis Avulsos de Zool., S. Paulo 42(15): 351-62.