12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



My identification of the fauna is as follows : 



Lioparia latelimbata (Dames) Lorenz ■:= Anomocare latelimhatum Dames 



Shantungia monkei Lorenz ^=Pagodia monkei (Lorenz) 



Obolella gracilis Lorenz :=cf. Obolus obscurus Walcott 



Orthis sp. and Acrothele sp. 



I do not find any statement of Doctor Lorenz that the species 

 enumerated by him were found in association. They do not appear 

 to have come from the same stratigraphic horizon. Pagodia mon- 

 kei (Lorenz) is essentially an Upper Cambrian type, while Anomo- 

 carc latelimbatum Dames is from the Middle Cambrian. 



I have not attempted to follow the classification of the trilobites 

 given by Doctor Lorenz which is largely based on the division of 

 the shell structure into non-porous (dense) and porous. The miner- 

 alization of most of the specimens is such that it is often impracti- 

 cable to determine with any degree of satisfaction whether the shell 

 is non-porous (dense) or porous. 



By the courtesy of Dr. W. Deecke, of the Geological Institute of 

 the University of Freiburg, I received eight pieces of the rock con- 

 taining original specimens studied by Lorenz. These did not include 

 the types of Liostracus latus, Shantungia hiichruckeri, Obolella gra- 

 cilis, or the specimens referred to Drepanura and Teinistion. I have 

 had three of the specimens photographed (plate 7, fig. la; plate 20, 

 fig. 8; plate 22, figs. 2, 2a, 2&)' so that more direct comparison may 

 be made. The original of Shantungia monkei Lorenz is too unsatis- 

 factory to photograph. 



The student of the Cambrian formations and faunas of China 

 should consult the fine memoir of Dr. Eduard von Toll, 1899, on the 

 Siberian Cambrian.' It has many suggestions that the future student 

 of the Cambrian system in Asia should carefully consider. One of 

 them is that a great and important work awaits the investigator of 

 the Cambrian formations of Siberia. The field is a large one and 

 what we now know of it indicates a rich reward to the individual 

 who takes the time to thoroughly work out the formations and their 

 contained faunas. 



Mr. F. R. Cowper Reed, in discussing the pre-Carboniferous life 

 provinces of Asia, points out that the Cambrian fauna of Spiti in 



' The plate references in this paper are to be found in " The Cambrian 

 Faunas of China," C. D. Walcott, 1913- Pub. No. 54, Carnegie Institution of 

 Washington, Vol. 3. 



- :\Iem. I'Acad. imp. Sci. St. Petersbourg, 8th ser., Vol. 8, No. 10, 1899, pp. 

 1-57, pis. 1-8, and 9 text figs.: Beitrage zur Kenntniss des sibirischen Cam- 

 brium. 



A\ 



