CONTENTS 



Page 



Introduction 5 



Terminology 6 



Stratigraphy 8 



Comparison of the Ordovician beds in the different localities of Hupeh . . . . 8 



Western Hupeh 8 



Eastern Hupeh lo 



South-eastern Hupeh lo 



Northern Hupeh ii 



The geological horizon of the so-called Neichiashan and Ichang formations. . . 12 

 The relationship between the Ordovician cephalopoda from Hupeh, central 

 China, and those from the corresponding horizon in the northern as well as 



southern China 13 



Manchuria 1.3 



ChihU 14 



Shantung i5 



Honan 16 



Kiangsu 16 



Chekiang I7 



Hupeh 17 



Szechuan 18 



Between Szechuan and kweichow 18 



Yunnan ^9 



Description of species 23 



Genus Cameroceras Conrad (emend. Hyatt) 23 



Cameroceras cf. styliforme Grabau 



Cameroceras tenuiseptum Hall var. ellipHcum Yii (var. nov.) 24 



Cameroceras hsiehi Yi\ (sp. nov.) .. • 25 



Cameroceras subtile Yii (sp. nov.) 26 



Cameroceras sp 27 



(II) I 



