108 



v. Richthofen : China- Atlas, Verlag v. Dietrich Reimer, Berlin, 1885 

 v. Szechenyi: Ostasiatische Reise III. 



v. Toll: Beitrag zur Kenntniss des sibirischen Cambrium. Mem. Acad. de 

 St. Petersbourg. Scienc. phys. et math. (8) VIII. 



Walcott: Fauna of the Olenellus Zone. 10. annual report. U. S. 

 Geol. survey. Part I. 



Walcott: Palaeontology of the Eureka district. U. S. Geol. survey 

 Monograph VIII. 



Walcott: On cambrian Faunas of North America. Bull. U. S. Geol. 



Survey 1885 vol. IL 

 Walcott: On Cambrian Faunas of North America. Bull. U. S. Geol 



Survey 1886. 



Walcott: Cambrian Faunas of China. Proc. U. S. Nat. Museum 

 XXIX, 1905. 



Wallerius: Unders. öfrer Zonen med Agnostus laevigatus. Akad. 



Afhandl. Lund 1895. 

 Woodward, Henry: Trilobites from Jen-tsy-yai,Schantung, North China 



Geol. Magazine 1905, S. 251. 



