PROCEEDIi\U>'^ OF THE NA TIONAL MUSEUM. 



VOL. XXIX. 



Middle Cambrian Cliang Hsia formation. 



Lower Cambrian Man To formation. 



Pre-( 'amiirian Tai Slian Complex. 



Trilobita— Continued. 



Pti/clwparia frequens, P. tellus, P. tcnrs, P. ti- 



tiana, P. theano, P. tqlun. 

 P. (Ltostracus) megalurus, P. {L.) thraso, P. 



(L.) toxeus, P. (i.) tragus, P. [L.) tutia. 

 P. (Proampyx) sp. 

 Solenopleura abderus, S. aranlhci, S. acidalia, 



S. agno. 

 Orepicephalus damia, C. magnus. 

 Dolichometopus alceste, D. deois, D. derceto. D. 

 dirce. 

 Ostracoda: 



Bradoria bergeroni, B. emjn, B. eris, B. fragUis, 

 B. stereope, B. woodi. 

 Brachiopoda: 



Obolella asiatica. 



Billinggella pumpellyi {f), B. richthofeni. 

 Gastropoda: Stcnothcca rugosa ehinensis. 

 Pteropoda: Hyolithes delta. 

 Trilol)ita: 



Rrdlichia ehinensis, R. nobilis. 

 Ptychuparia aclis, P. constricta, P. gramdosa, 

 P. impar var., P. mantoensis. 



Table Showing Geologic and Geographic Distribution of the Fauna. 



