Vol L 



Grabau Ordovician Fossils from North China 



(i) 95 



Measurements: The following are the measurements of the pygidia described and 

 of that figured by Lorenz. 



HORIZON AND LOCALITY : In the Machiakou limestone of Chaokouchuang in the 

 Kaiping basin, Chihli province (Survey expedition coll.)- Lorenz 's type came from 

 essentially the same horizon near the summit of the Hoshan in Shantung. 



Asaphus sp. 



There is at least one other species of Asaphus (or Isotelus?) in the collections from 

 the Kaiping basin, but the material is too fragmentary for description. It indicates, 

 however, a much larger species than A. boehmi. Asaphus? of an indeterminate species has 

 also been recorded by Weller in these rocks near Tsai-Kia-Chuang in Shantung. Other 

 species are found in south China, but these are excluded from the present discussion. 



