内蒙古自治区百灵庙北部晚志留世地层称为巴特敖包群。分布于百灵庙西北的查干合布、巴特敖包及阿木山以南的苏计冬屋一带该群分布不很连续,出露不够完整,但其中富含床板珊瑚、四射珊瑚、腕足类及苔藓虫、三叶虫等。笔者对其中四射珊瑚进行了研究, 其中发现了14个新种,这里作一报道,并对该区志留纪地层划分和对比进行了探讨。 Inner Mongolia Braun temple north late Silurian stratum called Bart Obo group. Located in the northwest of the Braun Temple Chagan Hebu, the Butte Obo and the Mount So Mu winter house around the group distribution is not very continuous, not fully exposed, but which is rich in bed corals, coral coral, brachiopods and Bryozoans, trilobites and so on. In this paper, four coral corals were studied, of which 14 new species were found, one report was made here and the division and contrast of the Silurian strata in this area were discussed.