(ni) 6 Palxontologia Sinica Ser. B. 



Discoceras eurasiaticuni Freeh (Common) 



Endoceras sp. (abundant) 



Cycloceras sp. (very abundant) 



Cytroceras sp. (rare) 



Asaphus cf. expansus Dalman (rare) 



In agreement with Freeh, Grabau, Hayasaka, Weller and others, Professor 

 Lee conchided thai the Neichia Series undoubtedly represents Middle Ordovician 

 or the lowest part of the Upper Ordovieian, being approximately equivalent to 

 the Vaginoeeras limestone of the Baltic Provinces of Russia. 



In Nanchang Hsien of northern Hupeh Mr. C. C. Yii found the Neichia 

 formation resting conformably on the Ichang limestone. Here as in western 

 Hupeh, the Neichia is composed of two parts, a lower yellowish-green shale and an 

 upper yellowish-green limestone. The fossils from each were preliminarily de- 

 termined by Mr. Yii as follows: 



(a) Fossils found in the lower shale 



Graptozoa: Didymograptus murchisoni 



Didymograptas sp. (several species) 



Brachiopoda: Orthis sp. (several species) 

 Orthis calligramma Dalni. 

 Dalrnanella s}). 

 Dinorthis sp. 



Ostracoda: Leperditia sp. 



Trilobita: Asaphus sp. 



Asaphus hupehensis Sun and Yii 

 Taihungshania shiii Sun and Yii 

 Illaenus nanchangensis Sun and Yii 

 Bronteus sp. 

 Bathyuras minor Sun and Yii 



(b) Fossils found in the upper limestone 



Cephalopoda: Cycloceras sp. 



Orthoceras sp. (several species) 

 Orthoceras chinense Foord 

 Vaginoeeras chientzekouense Yii 



The lower shale unquestionably represents the Triplecia Beds while the 

 upper limestone is the Pagoda Limestone. Because of the presence of the Char- 

 acteristic graptolite Didymograiitus iiiurdhisunl Mr. Yii correlated the former with 



