There are about 3,750 known species of lizards, and more than 150 species in about 9 families are known in China. Most are small to medium-sized reptiles. The general species has well-developed limbs, five fingers and toes, and claws at the end, which are suitable for crawling and digging. A few species have degenerated or missing limbs and long tails. There are shoulder girdle and sternum, the eyelids are movable, the tongue is flat and retractable, but there is no tongue sheath. There are also