NO. I CAMBRIAN FAUNAS OF EASTERN ASIA 6l 



The fauna is unknown in Manchuria, although Blackwelder con- 

 sidered that the Yung-ning sandstone of southern Liau-tung was 

 probably of Lower Cambrian age/ 



In this and the following lists I have combined the local lists, 

 placing after each species the locality number, so that each species 

 may be traced back to its local list and thus found with its immediate 

 associates in the strata. 



In Central Shan-tung the Man-t'o sandstones contain a small 

 fauna, as follows : 



Billingsella richthofeni (C3, C20) Ptychoparia aclis (C 17, C 20, C31) 



Obolella asiatica (C 17, C32') Ptychoparia granosa (C 17) 



Helcionella rugosa chinensis (C3) Ptychoparia impar (C17) 



Hyolithes delia (C3) Ptychoparia ligca (C31) 



Hyolithes sp. undt. (C 32') Ptychoparia {Emmrichella) con- 

 Redlichia chinensis (C 15, C 16, C27) stricta (C3) 



Redlichia nohilis (C3) Ptychoparia {Emmrichella) mantoen- 

 Rcdlichia sp. undt. (C6) sis (C20, C31) 



Of the above, Obolella asiatica, Helcionella rugosa chinensis, and 

 Redlichia chinensis may be considered as characteristically Lower 

 Cambrian. I do not know of the occurrence of the genus Obolella 

 above the Lower Cambrian ^ and Helcionella rugosa belongs to the 

 same fauna. Redlichia chinensis and R. nobilis have been referred 

 to as descendent from Olenellus^ but I would now cite Callavia in 

 place of Olenellus, as the latter genus appears to have left no de- 

 scendants. It should also be noted that the very ancient form Neva- 

 dia has a tapering glabella and long eye-lobes,* which leads me to 

 consider Redlichia as an example of reversion to a more primitive 

 type in the form of the glabella. The thorax and pygidium of Red- 

 lichia are more like the same parts in Wamieria^ except for the 

 median spines of the thoracic segments. 



It is to be anticipated that the Man-t'o shale Redlichia fauna will 

 be found at other localities in eastern China, but at the present writ- 

 ing the nearest locality is in southern China near Yun-nan, about 

 1,300 miles (2,100 km.) to the southwest. At this locality Redlichia 

 chinensis occurs in a shale and associated with it a new genus of 



^ Blackwelder, Eliot. Research in China, Pub. No. 54, Carnegie Institution 

 of Washington, Vol. i, Pt. I, 1907, Chap. 5, Reconnaissance in southwest 

 Liau-tung, p. 87. 



^Walcott, C. D. Monogr. U. S. Geol. Survey, Vol. 51, 1912, Cambrian 

 Brachiopoda, p. 588. 



^ Idem, Smithsonian Misc. Coll., Vol. 53, Cambrian Geology and Paleon- 

 tology, No. 6, 1910, Olenellus and other genera of the Mesonacidae, p. 254. 



* Idem, pi. 23. 



° Idem, pi. 30. 



