REPORT ON UPPER PALEOZOIC FOSSILS FROM CHINA. 303 



tance to the absolute break or change which divides them. It would hardly 

 be warranted, on this evidence alone, to decide that the fauna under con- 

 sideration is older than the Upper Carboniferous, although I believe this to 

 be the case. On the other hand, the presence of the genus Spirifer fixes the 

 age of this fauna as post-Ordovician. It is impossible to state positively, 

 however, whether it is Upper Silurian, Devonian, or Lower Carboniferous. 

 As well-characterized Devonian faunas having nothing in common with this 

 are known in China, the chances are lessened for its being Devonian. The 

 evidence of the Bryozoa is indicative of an age corresponding to the American 

 Mississippian, but the brachiopods are unlike those of any Mississippian 

 fauna known to me. This group of fossils seems to me rather to recall 

 vSilurian types, and this impression is in some measure borne out by certain 

 resemblances to Silurian forms from China, especially those from Tshau-tien, 

 figured by Kayser, although it can hardly be claimed that the species are 

 identically the same in a single instance. I may say in this connection that 

 as my own knowledge of the Bryozoa is as yet but slight, I have received 

 valuable advice from Mr. R. S. Bassler, of the United States National 

 Museum, regarding those of the present collection. 



I am also a debtor to Mr. Willis and to Mr. Blackwelder for references 

 to literature and for many helpful suggestions, not to mention the interesting 

 collections which I have been privileged to study. 



REGISTER OF LOCALITIES. 



1. Two miles (3.2 km.) north of Ta-ning-hie"n, East Ss'i-chu'an. In black limestone and 



calcareous green sandstone at base of the Canyon limestone. 



2. Two miles (3.2 km.) more or less north of Ta-ning-hien, East Ss'i-chu'an. Bottom of 



the massive Canyon limestone at contact with the green shales. 



3. Two miles (3.2 km.) north of Ta-ning-hien, East Ss'i-chu'an. In black limestone and 



calcareous green sandstone at base of the Canyon limestone. 



4. Three and one-half (5.6 km.) miles above Ta-ning-hien, East Ssi-chu'an. In axis of 



sharp anticline in the Canyon limestone. Near Yen-ch'ang. 



5. Seven miles (12.2 km.) south of Ta-ning-hie'n, East Ssi-chu'an. In gray limestone 



associated with calcareous shales lying upon the "red beds." 



6. Two miles (3.2 km.) below Ta-miau-ss'i, East Ss'i-chu'an. In crystalline limestone, 



part of the thick series underlying the anthracite coal measures. 



7. One-half mile (0.8 km.) north of Liang-ho-k'ou, East Ss'i-chu'an. At contact of the 



black cherty limestone with the green argillites. 



8. Two miles (3.2 km.) more or less below Ta-miau-ssi', East Ssi'-chu'an. 



9. Two miles (3.2 k.m) below Ta-miau-ss'i, East Ssi'-chu'an. 



16. Ta-ning-hien, East Ssi-chu'an. Near the middle of the thick Carboniferous (?) lime- 



stone. 



17. Tung-kuan-k'ou, East Ssi-chu'an. Above (?) an anthracite seam in the coal series. 



20. Y6n-yi-ssi. 20 miles (32 km.) north of Ho-chou, Shan-si. In dark bituminous lime- 

 stone in the Shan-si (coal) series. Exact horizon unknown. Exposure in the main 

 road one-fourth mile (0.4 km.) north of the village. 



59. One mile (1.6 km.) north-northeast of Ts'ai-kia-chuang (Tsing-ko-tschwang), Shan- 

 tung. Strata resemble Ching-lung limestone. Fossils almost wholly in cherts or 

 on weathered surfaces. In rubble over limestone outcrops 200 yards (182.8 m.) 

 southwest of gneiss contact. 



69. One mile (1.6 km.) northwest of Yen-chuang, Shan-tung. Found in limestone block 

 lying upon tailing pile of a deserted coal mine. 



