FORMATIONS AND FOSSILS OF SOUTH MANCHUBIA 



31 



assume that the Kangyao is likely also present in the Pen-hsi-hu and 

 Niu-hsin-tai areas. The fact that I also found a number of gastro- 

 pods belonging to Lophospira or EotoTnaria in the lower part of the 

 Ordovician strata in these two areas may at least support the opinion 

 that the Kangyao is represented in other areas of the Taitzu district. 

 Furthermore, in my opinion the fossil that Kobayashi identifies as 

 Pagodispira derwiduii Grabau is Lophospira producta pagodai. 





Kuantung district 



Pechili district 



Tai-tzu-ho district 





Kan-tao-tzu sub- 

 district 



Wu-hu-tsui sub- 

 district 



Liaoyang-Yentai 

 subdistrict 



Penhsihu-Niuhsintai 

 subdistrict 



1 



'? 

 o 

 ■O 

 1-1 

 O 





Ssuyen. 



Ssuyen. 



Ssuyen. 



Ssuyen. 



I 



Wuting. 



Wuting. 



Wuting. 



Wuting. 



Absent. 



Kangyao. 



Kangyao. 



Kangyao. 



1 

 a 



03 



Q 



Absent. 



Absent. 



Santao. 



Santao. 



a 



S, 

 3 



03 



o 



Pingchou. 



Pingchou. 



Pingchou. 



Pingchou. 



STRATIGRAPHIC CORRELATIONS 



When the Canadian and Ordovician strata of South Manchuria 

 are compared with those of North China, there is no doubt that the 

 upper and middle parts of the Machiakou limestone, in the Kaiping 

 Basin, Chihli, are the equivalent of the Ssuyen formation, and in 

 general both faunas have quite intimate relations with the Black 

 Eiver formation of North America. The following five species are 

 common to both the Machiakou and Ssuyen faunas : 



Armenooeras couUngi (Grabau). 

 Armenooeras nanum (Grahan). 

 Armenocertis richthofeni (Freeh), 



Armenooeras tani (Grabau). 

 Cycloceras? peitoutzense Grabau. 



And the following paired species resemble one another closely: 



Ssuyen Formation 



Armenooeras asiaticum, new species. 

 Armenooeras elongatum, new species. 

 Arm,enoceras hatai, new species. 

 Armenooeras hayasakai, new species. 



Armenooeras magnituhidatum, new 



species. 

 Ormooeras orientaJe, new species. 



MAOHLiKOU Limestone 



Armenooeras tani (Grabau). 

 Armenooeras suhmarginale (Grabau). 

 Armenooeras coulingi (Grabau). 

 Armenooeras suanpanoides (Grabau). 



