2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



ILLUSTRATIONS 



PLATES PAGE 



1. View of side canyon of the 0-shui-ho near Yen-t'ou, Shan-si 36 



2. View of the Yang-tzi canyon at Nan-t'ou, Hu-pei 41 



3. View in the canyon of the T'ai-shan-ho southwest of Sh'i-pan-k'ou, 



Shan-si 56 



TEXT FIGURES 



1. Section of the Sinian system in the Ch'ang-hia district, Shan-tung 51 



2. Section of the Sinian system in the Sin-t'ai district, Shan-tung 52 



3. Partial section of the Sinian system south of Tung-yii, Shan-si 53 



4. (Blackwelder). — Ch'ang-hia, Shan-tung. Section of Cambrian strata in 



the north side of Man-t'o butte 54 



5 and 6. (Blackwelder). — Yen-chuang, Shan-tung. Section of Cambrian 



strata in the western part of the Kiu-lung-shan 54-55 



7. (Blackwelder). — Ch'au-mi-tien, Shan-tung. Section of Upper Cam- 



brian and Lower Ordovician strata in the ridge east of the village 55 



8. (Blackwelder). — Yen-chuang, Shan-tung. Section of Kiu-lung forma- 



tion in Kiu-lung-shan 55 



9. Correlation table of the fossiliferous sections measured by Professors 



Willis and Blackwelder, showing stratigraphic positions of the locali- 

 ties 57 



INTRODUCTION 



A memoir on " The Cambrian Faunas of China " was pubHshed 

 by the Carnegie Institution of Washington in 1913 as a quarto vol- 

 ume illustrated by 9 text figures and 24 plates containing 946 figures 

 of fossils. The volume was issued in an edition of 750 copies, of 

 which 308 were sent to libraries, 29 to individuals, and the remain- 

 der held for sale at $5.00 per volume. 



I find there is a desire on the part of teachers and students of 

 geology and Cambrian paleontology that the general results of the 

 study of the Cambrian faunas of eastern Asia be put in such form 

 as to make them readily accessible for consultation without recourse 

 to the memoir. With this in view, and in order to place the data 

 contained in the introduction in the hands of many of the younger 

 geologists and students who do not have access to the memoir, per- 

 mission was obtained from the Carnegie Institution to republish the 

 Introduction. Slight additions have been made to it with reference 

 to the work on Cambrian geology and paleontology by M. J. Deprat 

 and M. H. Mansuy ^ in Indo-China, and on the boundary line be- 

 tween the Cambrian and post-Cambrian formations. 



^ Mem. du Service geol. de ITndo-Chine, Vol. I, 1912, Etude geologique du 

 Yun-Nan oriental, Pt. i, Geologic general ; Pt. 2, Paleontologie. 



