Abstract: 1. The are, chord and circumference of 249 adult skulls of known sex (male 142, female 107) collected in Qingdao district of· Shandong province were measured and some indices were calculated.
2. The ares of the frontal, parietal and occipital bone were compared and classs fied. The are of the parietal bone is the longest in more than 50% of the samples, and the longest frontal bone is more common in fem. ale than in male.
3. The measurements showing significant sexual difference were used for. sex-diseriminating analysis.
4. The measurements of the present samples were compared with those'tollectea from Zhangchun district and there are significant differences between them.

Key words: Skull; Arc; Chord; Circumference; Sex-discriminating analysis