8 RESEARCH IN CHINA. 



specimens studied by Lorenz. These did not include the types of Liostracus 

 latits, Shantungia biichruckeri, Obolella gracilis, or the specimens referred to 

 Drepanura and Tcinistiou. I have had three of the specimens photographed 

 (plate 7, fig. ia; plate 20, fig. 8; plate 22, figs. 2, 20, 2b}, so that more direct 

 comparison may be made. The original of Shantungia monkei Lorenz is too 

 unsatisfactory 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 Cam- 

 brian. 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 prov- 

 inces of Asia, points out that the Cambrian fauna of Spiti in northern India 

 has a stronger affinity with that of western North America than with any 

 other Cambrian fauna 1 [Reed, 1910]. The bearings of this are not enlarged 

 upon further than to indicate a connection between the Himalayan region 

 and North America during Middle Cambrian time. 



'Records Geol. Surv. India, vol. XL, plate i, 1910, p. 10. 



