NO. I CAMBRIAN FAUNAS OF EASTERN ASIA 71 



The Shan-si subprovince^ has five species of Middle Cambrian 

 fossils and one Upper Cambrian species common to it and to the 

 southern Shan-tung Province area in Shan-tung, as follows : 



Lower Ch'ang-hia Fauna. — Obolus obscurus, Obolus shansiensis, Acro- 



treta shantungensis, Agnostus chinensis, Crepicephalus damia. 

 Ch'au-mi-tien Fauna. — Plectorthis kayseri. 



With the Manchurian extensions of the Shan-tung Province the 

 Shan-si fauna has five species in common, as follows : 



Shan-si and Manchuria. — Obolus shansiensis, Acrotreta shantungensis, 

 Orthotheca glabra, Agnostus chinensis. 



In southern China, as previously stated [p. 62], there is no record 

 pointing to a connection between the Punjab-Man-t'o sea and the 

 Lower Cambrian seas of northern Siberia, or western North Amer- 

 ica. The fauna described by M. Mansuy [p. 62] is related to 

 the Man-t'o shale Redlichia fauna of Shan-tung. 



In Middle Cambrian time, as stated by Reed, the Spiti fauna is 

 more strongly related to that of western North America than to any 

 other Middle Cambrian fauna." So far as China is concerned, the 

 northern Indian fauna is that of another faunal province. 



The Cambrian fauna of the Siberian Province includes species 

 that are referred to the Middle Cambrian fauna, and a few that may 

 be tentatively assigned to the Lower Cambrian. Doctor von ToH 

 has identified a number of genera of the Archseocyathin?e '' that may 

 occur in the upper portion of the Lower Cambrian terrane. The one 

 species of Cosciuocyathus from China, C. elznra Walcott, occurs m 

 the Middle Cambrian, but this is a very small form and may have 

 been a survival in Middle Cambrian time of the large Archaeocya- 

 thinae fauna of late Lower Cambrian time. In North America the 

 Archaeocyathinge flourished most abundantly in late Lower Cambrian 

 time * on both the eastern and western sides of the continent. Von 

 Toll lists from the Archceocyathus limestones of Torgoschino,^ in 



^ The geographic distribution of the Shan-tung, Manchuria, and Shan-si 

 Cambrian rocks is shown by Willis : Research in China, Pub. No. 54, Carnegie 

 Institution of Washington, Vol. 2, 1907, Systematic geology, plate 4. 



^ Reed, F. R. C. Mem. Geol. Survey India, Palaeontologia Indica, ser. 15, 

 Vol. 7, 1910, No. I, The Cambrian fossils of Spiti, pp. 64, 65. 



= Toll, E. von. Mem. I'Acad. imp. Sci. St. Petersbourg, 8th sen, Vol. 8, No. 

 10, 1899, Beitrage zur Kentniss des sibirischen Cambrium, p. 53. 



* Walcott, C. D. Tenth Ann. Rcpt. U. S. Geol. Survey, 1890, Pt. i, The fauna 

 of the Lower Cambrian or Olenellus zone, pp. 599-602, pis. 50-55. 



° Toll, E. von. Mem. I'Acad. imp. Sci. St. Petersbourg. 8th ser., Vol. 8, No. 

 10, 1899, Beitrage zur Kentniss des sibirischen Cambrium, p. 53. 



