THE CAMBRIAN FAUNAS. 5 
? Olenellus sp. undt. Ptychoparia meglitzkiit von Toll=Inouyia 
Dorypyge slatkowskii Schmidt ? Solenopleura sibirica Schmidt 
Ptychoparia czekanowskiivon Toll=Inouyia Bathyuriscus howelli 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 sodent Stephanocare richthofeni 
Liostracina krausei Drepanura premesnili Stephanocare sp. 
Teinistion lansi Drepanura ketteleri 
Of the above, three genera and species described by me in 1905 are 
synonyms: 
Ptychoparia ceus Walcott ++ +++++++seeees = Liostracina krausei Monke 
Dorypygella typicalis Walcott: +++++++++-5 = Teiniston lansi Monke 
Damesella chione Walcott: +++++++++eeees = Stephanocare richthofent 
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 A gnostus koerferi Monke differs materially from A gnos- 
tus chinensis Dames, except in the unattached pygidium. 
Teinistion lansi Monke is similar in many respects to Shantungia spint- 
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 Algae under the new family Ascosomacee of the Siphonee. 
The genus Ascosoma was proposed to include one species, A scosoma 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 Algeze nor sponges [Lorenz, 1905, 
PDeie, 131 
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 1906.* 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.’ 

‘Beitriage zur Geologie von Schantung: I. Obercambrische Trilobiten von Yen-tsy-yai. Jahrb. Kénigl. 
Preuss Geol. Landesanstalt und Bergakademie zu Berlin, vol. xx1m, 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. 
