Heiv'ews — Baron jRichthofen's China: — Palceontology. 189 



deposits in these areas have suffered but slightly fi-om metaraorphic 

 influences, there is reason to hope that more detailed research will 

 lead to the discovery of an earlier fauna than that at present known. 



The first memoir, by Dr. W. Dames, is on the Cambrian Trilobites 

 of Liau-tung. Unfortunately the specimens preserved are mere 

 fragments, and mostly consist of the glabella with the fixed cheeks 

 and the pygidia ; not a trace of a thorax is present. They are 

 referred to the genera Conocephalites, Anomocare, Liostracus, Agnostus 

 knd a new genus Dorypyge. These Chinese trilobites pi'esent ari 

 astonishing resemblance to American forms, as well as to those frona 

 Norway and Sweden ; the differences, in fact, consist in very minute 

 details, which, however, are considered to be of specific value. The 

 general facies of the forms (with the exception of Dorypyge) indicates 

 that the rocks in which they occur are homotaxial with the lowest 

 Potsdam Group of North America and the Andrarum Limestone of 

 Scandinavia. FroTn the resemblance of two American species, 

 Dikellocephahis gothicus, Hall, and D. quadriceps, Hall, from the 

 Quebec group of Utah, to Dorypyge Bichthofeni, Dames, it is concluded 

 that the rocks containing this species belong to a similar geological 

 horizon. Dr. Dames states that the two above-mentioned American 

 species referred by Hall to DikeUocephahis have in reality hardly a; 

 single feature in common with type forms of this genus, and they 

 are therefore included in the genus Dorypyge. 



The second memoir, by Dr. E. Kayser, contains descriptions of two 

 imdetermined species of Lingidella and of a new species of OrtJiis, 0, 

 Linnarssoni, from the Cambrian strata of Liau-tung. Entire beds of 

 limestone are filled with this OrtJiis, which has a close resemblance 

 to forms from the Andrarum-Kalk of Sweden, referred by Liunarsson 

 to 0. Hichsii, Salt., and 0. exporrecta, Lin. 



The next treatise, also by Dr. Kayser, gives descriptions of Middle 

 and Upper Silurian fossils from the mountain district of Tshau-tieu. 

 These consist of fragmentary Trilobites belonging to the genera 

 Asaplius, Cidymene and Trinucleus ; a new species of this latter genus 

 is present in such numbers that the rock is nearly entirely composed 

 of its detached head-shields. The Brachiopofla are represented hy 

 the genera Orthis, Leptmia, Strophomena, Spirifera, Bhynconella, 

 Atrypa, Merista, and Nucleospira. The majority of the species are 

 identical with the commoner forms which exist in the Trenton, 

 Cincinnati, and Niagara groups of North America, and the Bala and 

 Wenlock series of England and their equivalents in the Baltic 

 Silurian basin. 



The fourth memoir, on the Silurian Corals of Tshau-tien by Dr. G. 

 Lindstrom, has already been noticed in the Geological Magazine.^ 



In the fifth memoir Dr. E. Kayser describes the fossils of 

 Devonian age from South-westerly China. With the exception of 

 three species of Corals belonging to Ghcetetes and Anlopora, and two 

 forms of Sptrorbis and Corrmlites, they consist of Brachiopods, for 

 the most part of the same genera as are above enumerated from the 



' - 1 Dec. II. Vol. X. 1883, p. 86. 



