A REPORT ON ORDOVICIAN FOSSILS COLLECTED IN EASTERN 



ASIA IN 1903-04. 



The Ordovician fossils secured by the members of the Carnegie Institu- 

 tion of Washington expedition to Eastern Asia are comprised in two collec- 

 tions from two widely separated regions, one in the province of Shan-tung, 

 the other in the extreme eastern portion of the province of Ssi-ch'uan. These 

 two collections will be considered separately, as they contain very little in 

 common. 



COLLECTION FROM SHAN-TUNG. 



The Shan-tung collections are all poorly preserved material, too imper- 

 fect for specific identification, but sufficient to demonstrate without question 

 the Ordovician age of the rocks from which they were secured. Any closer 

 correlation of the Tsi-nan limestones from which most of the specimens were 

 collected can not be made with certainty, although it is probable that the 

 formation belongs somewhere in the middle division of the Ordovician, or in 

 what in North America is called Mohawkian. Several localities are repre- 

 sented in the collection, and the fauna from each of these will be considered 

 in order. 



Locality C39. Ch'au-mi-tien, Shan-tung, about 400 feet (121. 9 m.) 

 above the base of the Tsi-nan limestone. 



i. Orthoceras sp. Two specimens, both of which are weathered longitudinal 

 sections, poorly preserved. 



Locality C 53. Seven and a half miles (13 km.) south-southeast of 

 Sin-t'ai-hien, Shan-tung, a few hundred feet below the top of the Tsi-nan 

 limestone, the exact horizon not determined. 



1. Gastropod. A cross-section of a small coiled shell upon the weathered sur- 



face of the limestone. Too imperfect for either generic or specific 

 determination. 



2. Orthoceras sp. Weathered longitudinal section similar to those of the last 



locality. 



Locality C 59. These fossils were found in loose rubble lying upon out- 

 crops of the Tsi-nan limestone, i mile ( i .6 km.) northeast of Ts'ai-kia-chuang, 

 Shan-tung. The material consists of limestone and cherts. The limestone 

 specimens are undoubtedly of Ordovician age, but the cherts seem to be 

 Carboniferous and were doubtless derived from the Carboniferous rocks 

 which are exposed only a few miles distant. The fossils recognized in the 

 limestone are as follows : 



i. Orthis ? or Daliuanclla ? sp. An imperfect impression of a single valve of a 

 brachiopod shell. It appears to be an orthid, and probably belongs 

 either to the genus OrtJiis or to Dalmanella, but it is too imperfect for 

 certain generic or specific determination. 



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