作者：吴汝康 董兴仁

摘要：Four fossil human teeth were discovered from the Longgudong cave (111°10` E,33°N)，Dujiagou, Meipu, Yungian county, Hubei province by IVPP in 1975. They are the upper central incisor, lower lateral incisor, upper second premolar and upper first molar, all of the right side.
    The teeth are all much bigger in size than those of modern man, but similar to those of Sinanthropus and Pithecanthropus. So far as the morphological characters are concerned, the I¹ is shovel-shaped and bears a well-developed basal tubercle and discernible finger-like prolongations on the lingual surface. The lingual surface of the  I₂ is faintly shovel-shaped. There is only a slight smoqth swelling at the basal part of the lingual surface representing the lingual tubercle. The root of I₂  is relatively bulky. The chewing surfaces of the P⁴ and M^l are covered by a number of accessory ridges. The pattern of the wrinkles is more complicated than that of modern man, but analogous to that of Sinanthropus. Both P⁴ and M^l retain the indications of the cingulum. The only preserved single lingual branch of the root of M¹ diverges from the buccal branches.
    In sum, the four teeth from Yunxian are very similar to Sinathropus and Pithecanthropus in size and other features. So we attributed the Yunxian specimen to Homo erectus in classification.
    Associated with the teeth, an evidently flaked core and more than 20 species of mammal fossils were found. According to the study of the fauna by Hsu Chun-hua, the geological time of the fossil human teeth may be slightly earlier than that of Homo erectus pekinensis.

卷期：18卷 02期

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