Abstract: A sample of 2760 cases including six groups in central and western parts of Inner Mongolia was investigated on rolling, folding, twisting, pointed and clover-leaf tongues. The results are as fol- lows: (1) The frequencies of rolling, twisting and clover-leaf tongues are mostly lower in the western part than those in the eastern part. (2) Significant difference was found on frequencies of folding, pointed and clover-tongues between Urad Mongols and three other Mongolia groups. (3) No significant sexual difference was found in the frequencies of five types. (4) Correlation occurred between rolling and twisting, rolling and clover-leaf, folding and twisting, twisting and pointed tongues, but didn' t occur between folding and pointed, folding and clover-leaf, pointed and clover leaf tongues.

Key words: Rolling tongue; Folding tongue; Twisting tongue; Pointed tongue; Clover-leaf tongue; Mongol; Han nationality