NO. I CAMBRIAN FAUNAS OF EASTERN ASIA 3 



In a preliminary paper, published in 191 1, illustrations were given 

 of a number of new genera and species of the Cambrian fauna of 

 China/ All of the types of the genera and species described in the 

 memoir have been recorded in the Catalogue of the United States 

 National Museum and are deposited in the collections of the 

 Museum.' 



PREFATORY OBSERVATIONS 



When looking over the descriptions of the stratigraphic sections 

 of the Paleozoic formations of China by Baron Ferdinand von Richt- 

 hofen,^ and their contained Cambrian fossils described by Dr. W. 

 Dames/ from Liau-tung, and Dr. Emanuel Kayser/ I was impressed 

 with the necessity of having the stratigraphic sections studied in 

 detail, and extensive collections of fossils made, in order that com- 

 parisons of value might be instituted between the Cambrian sections 

 and faunas of the western portion of North America and the Paleo- 

 zoic sections and their contained faunas in eastern Asia. This 

 project was held in abeyance for eighteen years, and had it not 

 been for the support of the Carnegie Institution of Washington it 

 might not have been consummated. 



Dr. Bailey Willis has given, in the preface of volume i, part i, 

 of " Research in China," 1907, a brief statement of the events that 

 led to the sending of an expedition in his charge and the securing 

 of data and collections by him and his associate geologist, Mr. Eliot 

 Blackwelder. 



On the return of Messrs, Willis and Blackwelder, I made a pre- 

 liminary study of the Cambrian fossils and submitted to them the 

 results of the study bearing on the interpretation of the various 



^ Cambrian Faunas of China, Smithsonian Misc. Coll., Cambrian Geology 

 and Paleontology, Vol. 57, 191 1, No. 4. 



^ Other papers that I have published on the Cambrian faunas of eastern 

 Asia are as follows : 



The Cambrian fauna of India, Proc. Washington Acad. Sci., Vol. 7, 1905, 

 pp. 251-256. 



Cambrian faunas of China, Proc. U. S. National Museum, Vol. 29, 1905, 

 pp. 1-106. 



Idem, Vol. 30, 1906, pp. 563-595- 

 ^ China, by Baron von Richthofen, 1882, Vol. 2, Das Nordliche China. 

 * China, by Baron von Richthofen, 1883, Vol. 4, Palseontologischer Theil, 

 Cambrische Trilobiten, pp. 1-33. 

 ' Idem, pp. 34-36. 



