2 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



Doctor Dames compared the Cambrian trilobites with those of 

 Europe, America, and India, and conchided that the trilobitic fauna 

 of Sai-ma-ki and Taling- were about the age of the Scandinavian 

 Andrarum limestone and tlie Potsdam group of North America. He 

 did not find any Chinese species that could be identified with those of 

 Scandinavia and America; but the general appearance of the fauna 

 as a whole was so similar that he said that their equal age may be 

 considered proven. 



He further states that the age of the rocks containing Doryiyyge 

 rlchtliofenl from Wulo-pu is proba])ly the same as that of the 

 Quebec group, basing this upon comparisons with species from Utah, 

 which he referred to the genus Dorypyge.'^ 



The collections made b}^ the Carnegie Institution of Washington 

 Expedition prove that Doryj)yge ricldliofeni occurs in the central 

 portion of the Chang Hsia formation and is of Middle Cambrian 

 age. Baron Richthofen's means of comparison were with the fauna 

 referred to the Quebec group, which was at that time supposed to be 

 of Lower Silurian (Ordovician) age. 



In 1800 M. Bergeron^ described the following Cambrian fossils from 

 some shaly limestones collected in the province of Shangtung, China: 



A(jw)stus (louvillei. Arfhricocej>}ialiin rltituveawi. 



Oleuoides lehlanci. Dicellocephalus ? sinensis. 



Drepanura premesnili. Calymmene ? sinensis. 



Of the above we have iderttilied the following from the Ku San shale 

 of the section made by Mr. Blackwelder: 



Olenoides iiblanci. 

 Drepanura premesnili. 

 Calymmene ? \_DameseUa'\ sinensis. 



From the Cambrian formations of Siberia, Dr. F. Schmidt' described 

 the following fossils: 



Agnostus czekanowskii. 

 Anomocare pawlowshiii 

 Liostracus maydeli. 



This fauna was subsequently reviewed by Edward von Toll,'^' who 

 added the following: 



Confervites primordialis Born. Coscinocyathus corhicida Born. 



Arclixocyathus acutus Born. Coscinocyathus dianihus Born. 



Archxocyathus aduncus Born. Coscinocyathus caJathus Born. 



Archxocyathus patulus Born. Coscinocyathus campamda Born. 



Archpeocyathtis proskurjakotvi von Toll. Coscinocyathus vesica Born. 



Archxocyathus sibiricus von Toll. Coscinocyathus elongatus Born. 



Archieocyathus ijizkii von Toll. Coscinocyathus irregularis von Toll. 



« China, Richthofen, IV, pp. 31-33. 



6 Bull, de la Soci^t6 Geol. de France, 3 ser., XXVIl, p. 499. 



cBull. de I'Acad. Imp. des Sciences de St.-Petersb., 1886, XII, p. 407. 



ci Mem. de I'Acad. Imp. dee Sciences de St.-Petersb., 8th ger., VIII, No. 10. 



