NO. 5 CAMBRIAN TRILOBITES 45I 



PAGE 



Coryncxochus {Bonnia) parvulus (Billings). (See plate 57. ) 328 



Fig. 6. (X8.) Enlargement of the surface of the occipital ring and 

 posterior portion of the glabella. U. S. National Museum, 

 Catalogue No. 62744. 

 (Note description and locality from plate 57, fig. lb.') 



Dorypyge richthofcni Dames 328 



Fig. 7. (X 1-5- ) Cranidium with finely rranulated surface and side 

 outline. From locality Cx, Middle Cambrian : Kiu-lung 

 group; south of Yen-chuang, Shan-tung. U. S. National 

 Museum, Catalogue No. 57876. 



7(7. (X I-5-) Central parts of a cephalon showing glabellar fur- 

 rows and coarse granulations. From locality C19, Middle 

 Cambrian : Ch'ang-hia limestone at Ch'ang-hia, Shan-tung. 

 U. S. National Museum, Catalogue No. 57878. 



•jb. (X2.) Thoracic segment showing straight pleural groove. 

 From locality C29, Middle Cambrian : Ch'ang-hia lime- 

 stone ; west of Ch'ang-hia, Shan-tung. U. S. National 

 Museum, Catalogue No. 57881. 



yc. (X I-5-) Top and side views of pygidium associated with 6a. 

 (C19) U. S. National Museum, Catalogue No. 57879. 



The above figures are reproduced from plate 8, figs, i, \a, id and 

 ic, respectively. Research in China, Vol. 3, Cambrian Faunas of 

 China, 1913, Carnegie Inst, of Washington. 



