PLATE III. 



Cambrian Trilobites froin^ Nortli China. Drairings by K. C. Liu (^ll^l^) 

 Fig. 1. Plychoparia {Emmerich ella) chengshanensis Sun p. 48 



la cranidium x -1 lb cranidium x 8 

 Late Lower Cambrian, Manto shale, Cheng-Shan, Chao-Kou-Chuang, 

 Chihli (Coll. Y. C. Sun. Cotypes G. S. Ch. Cat. Nos. 5.36, 537.). 

 Fig. 2. Changshania cnnica Sun p. 45 



2a cranidium x 2 2b cranidium x 3 



2c cranidium x 3 2d cranidium x 3 



2e hypostoma x 3 2f pygidium x 4 



2g pygidium x 4 2h pygidium x 3 



2i pygidium x 3 2j free cheek x 2 



2k free cheek x 2 



Early Upper Cambrian, Changshan Sliale, .Jen-Chuang, Chao-Kou- 

 Chuang, Chihli (Coll. A. W. Grabau. F. F. Mathieu & Y. C. Sun. C(. types, 

 G. S. Ch. Cat. Nos. 538, 539, 540, 541, 542, 543, 544, 545, 546, 547, 518.). 



Fig. 3. Chang si I an ia! irvjiruta Sun p. 46 



3 cranidium x 3 



lOarly I'^pper Cambrian, Changshan shale, .Jen-Chuang, Chao-Kou- 

 Chuang, Chihli (Coll. A. W. Grabau. Holotype, G. S. Ch. Cat. No. 54'.).). 



Fig. 4. ConoJcepl/aJiiui Icuipiugoixis Sun p_ 47 



4a cranidium x 3 



41) one fragmentary segment of thorax x 3 



Late Lower Cambrian, ^lanto shale, Cheng-Shan, Chao-Kou- 

 Chuang, Chihh (Coll. H. T. Yu. Holotypes, G. S. Ch. Cat. Nos. 550, 551.). 



Fig. 5. ConokepJadiiHi (/cri-irdi Sun p_ 43 



5a fragmentary cranidium x 3 (Paratype) 

 5b cranidium X 2 (Holotype) 

 5c fragmentary cranidium x 2 (Paratype) 



Late lower Cambrian, Manto shale, Cheng-Shan, Chao-Kno-Chuang, 

 Chihh (Cull. H. T. Yu, ^mm G. S. Ch. Cat. Nos. 552, 553, 554.). 



Fig. 6. Crepicephdhti^ sp p^ ^r) 



pygidium x 4. 



:^Iiddle Cambrian, Changhia limestone, Chcng-Slian, Chao-Kou- 

 Chuang, Chihli (Coll. K. S. Hsu, G. S. Ch. Cat iN.>. 555.). 



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