66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Above this horizon the fauna again changes. The trilobitic gen- 

 era Dorypyge, Dolichometopiis, and Solenopleura drop out and the 

 genera Damesella, Blackzuelderia, and Teinistion foreshadow the 

 rich and in many respects unique fauna of the Ku-shan shale. 



This fauna in the upper horizon of the Ch'ang-hia hmestone in 

 Shan-tung contains the following : 



Acrotreta pacifica (C 12) Pterocephalus asiaticus (C 12) 



Teinistion alcon (C 12) Inouyia acallc (C 12) 



Blackwelderia alastor (C 12) Inouyia ? rcgidaris (C73) 



Blackwelderia cilix (C73) Lisania ajax (C 12, C40) 



Damesella bdlagranulata (C 13) Anomocarella tutia (C12) 

 Damesella blackwelderi (C 12, C 13, 

 C 14, C 40) 



In the Ku-shan shaly beds, just above the beds containing the pre- 

 ceding, the following occur : 



Obolus (IVestonia) blackzvelderi Stephanocare ? sp. undt. (C6) 



(C6) Blackwelderia cilix (C55) 



Dicellomus parvus {C6) Blackwelderia sinensis (C6) 



Acrothele ? minuta (C6) Drepanura ketteleri (C6, C 55) 



Straparollina sp. undt. (C55) Drepanura ketteleri (C6, C55) 



Agnostus douvillei (C6, C55) Ptychoparia (Emmrichella) bromus 

 Redlichia sp. undt. (C6) (C6) 



Stephanocare ? monkei (C6) Liostracina krausci (C6) 



Stephanocare richthofeni (C6, C 55) Shantungia spinifera (C6) 

 Stephanocare sinensis (C6) 



This assemblage of genera and species forms a varied and unique 

 fauna, which has little in common with the faunas above and below 

 it in the strata. It is a local phase of the Cambrian fauna corre- 

 sponding somewhat to one of the subdivisions of the Middle Cam- 

 brian fauna of western North America as represented by the fauna 

 of the Stephen formation of British Columbia.^ In each there are 

 trilobites with large pygidia. Damesella and Neolenus, respectively, 

 are typical examples, and there are several genera not found at other 

 horizons or in other countries. 



The Middle Cambrian fauna of China, like that of western North 

 America, is marked by the absence of the genus Paradoxides. For- 

 tunately there are other genera that serve to connect the Paradoxides 

 fauna of the Atlantic Province with the Dorypyge fauna of the 

 Pacific Province. Dorypyge is associated with Paradoxides, Soleno- 

 pleura, Anomocare, etc., in northwestern Europe.' In China, Dory- 



^ Walcott, C. D. The Canadian Alpine Journal, Vol. i, No. 2, igo8, Mount 

 Stephen rocks and fossils, pp. 243-244, pis. 1-4. 



- Gronwall, K. A. Danmarks geol. Unders., Rjekke 2, No. 13, 1902, Born- 

 holms Paradoxideslag og deres fauna, pis. 3, 4. 



