THE CAMBRIAN FAUNAS. 5 



? Olenellus sp. undt. Ptychoparia meglitzkii von Toll = Inouyia 



Dorypyge slatkowskii Schmidt ? Solenopleura sibirica Schmidt 



Ptychoparia czekanou'skiivonToll = Inouyia Bathyuriscus hou'clli Walcott 



In 1903 Dr. H. Monke published a paper on the Geology of Shan-tung 

 and described certain "Upper Cambrian" trilobites/ as follows: 



Agnostus koerferi Teinistion sodeni Stephanocare richthofeni 



Lioslracina krausei Drepanura premesnili Stephanocare sp. 



Teinistion lansi Drepanura ketteleri 



Of the above, three genera and species described by me in 1905 are 

 synonyms : 



Ptychoparia ecus Walcott = Liostracina krausei Monke 



Dorypygella typicalis Walcott = Teiniston lansi Monke 



Damesella chione Walcott = Stephanocare richthofeni 



The following have not been identified in the material collected by 

 Willis and Blackwelder: 



Drepanura ketteleri Monke Teinistion sodeni Monke 



I do not find that Agiiostiis koerferi Monke differs materially from Agnos- 

 tus chinensis Dames, except in the unattached pygidium. 



Teinistion lansi Monke is similar in many respects to Shantungia spini- 

 fera Walcott, but differs in the presence of an incurved frontal margin, and 

 the absence of the long frontal spine. 



The detailed sections and the succession of the contained faunas prove 

 that the horizon of the fauna is in the upper part of the Middle Cambrian, 

 and not Upper Cambrian, as determined by Monke. 



In 1904 Dr. Th. Lorenz [1904, pp. 193-194] described some problem- 

 atical fossils? as Alga? under the new family Ascosomaceae of the Siphoneae. 

 The genus Ascosoma was proposed to include one species, Ascosoma phanero- 

 porata, and a second species was placed under a new genus as Mitscherlichia 

 chinensis. Doctor Lorenz stated that he would soon publish a full descrip- 

 tion, with illustrations, of the new family, genera, and species, but on further 

 study he decided that the fauna was neither Algae nor sponges [Lorenz, 1905, 

 pp. 12, 13]. 



In 1905 some of the results of the Carnegie Institution of Washington 

 Expedition to China were published by the writer, and a second paper 

 appeared in igoG. 2 These two papers included descriptions and certain 

 introductory notes on the Cambrian fossils collected by Messrs. Bailey Willis 

 and Eliot Blackwelder that are included in this memoir. Subsequently lists 

 of the species appeared in the report on the stratigraphic geology by Messrs. 

 Willis and Blackwelder.' 1 



'Beitrage zur Geologie von Schantung: I. Obercambrische Trilobiten von Yen-tsy-yai. Jahrb. Kiinigl. 



Preuss Geol. Landesanstalt und Bergakademie zu Berlin, vol. xxm, Pt. I, 1903. pp. 103-151. 

 ! Proc. U. S. National Museum, vol. xxix, 1905, pp. 1-106; Idem, vol. xxx, 1906, pp. 563-595. 

 'Research in China, Pt. I, pp. 19-43, 136-147, 272. 



