THE LARGER FAUNAL HORIZONS. 



53 



Anomocare sp. (025) 

 Anomocarella chinensis (62) 

 Anomocarella temenus (22) 

 Anomocarella trogus (025) 



Anomocarella lulia (C 19) 

 Dolichometopus deois (19) 

 Dolichometopus dirce (24) 



Above this horizon the fauna again changes. The trilobitic genera Dory- 

 pyge, Dolichometopus, and Solenopleura drop out and the genera Damesella, 

 Blackwelderia, 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 limestone in Shan-tung 

 contains the following: 



Acrotreta pacified (Ci2) 



Teinistion alcon (Ci2) 



Blackwelderia alastor (Ci2) 



Blackwelderia cilix (073) 



Damesella bellagranulata (C 13) 



Damesella blacku'dderi (C 12, C 13, C 14,040) 



Pterocephalus asiaticus (C 1 2) 

 Inouyia acalle (C 12) 

 Inouyia ? regularis (C 73) 

 Lisania ajax (C 12, 40) 



Anomocarella tutia (C 12) 



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

 the following occur: 



Obolus (Westonia) blackwelderi (C6) 

 Dicellomus parvus (C6) 

 Acrothele ? minuta (C6) 

 Straparottina sp. undt. (55) 

 Agnostus doiimllei (C6, 55) 

 Redlichia sp. undt. (C6) 

 Stephanocare ? monkei (C6) 

 Stephanocare richthofeni (C6, Css) 

 Stephanocare sinensis (C6) 



Stephanocare ? sp. undt. (C6) 

 Blackwelderia cilix (55) 

 Blackwelderia sinensis (C6) 

 Drepanura ketteleri (C6, 055) 

 Drepanura premesnili (C6, 055) 

 Ptyclwparia (Emmrichella) bromus (C6) 

 Liostracina kraiisei (C6) 

 Shantungia spinifera (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 corresponding somewhat to one of 

 the subdivisions of the Middle Cambrian fauna of western North America as 

 represented by the fauna of the Stephen formation of British Columbia 

 [Walcott, igoSc, pp. 243-244, plates i-iv ; 1908?, pp. 2 10, 2 1 1 ]. 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 Amer- 

 ica, is marked by the absence of the genus Paradoxides. Fortunately 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 associ- 

 ated with Paradoxides, Solenopleura, Anonwcarc, etc., in northwestern Europe 

 [Gronwall, 1902, plates 3, 4]. In China, Dorypyge [see Locality 35?% p. 26] is 

 found with Solenopleura, Anomocare, Dolichometopus, and other genera associ- 

 ated with Paradoxides in the Atlantic Province. The order of stratigraphic 

 succession of the Dorypyge fauna is essentially the same in the two provinces. 



