Vol. I. Sun — Cambrian Faunas of North China (iv) 51 



down anteriorly to the broad shallow groove in the front of the glabella ; frontal rim mo- 

 derately convex, broad in the middle, becoming narrower towards each sides. 



Fixed cheeks very narrow; eye lobe of medium size, centrally placed. 



The associated pygidium is of about the size of that of Ceratopyge forficula. It is 

 broader than long with a well-defined convex median axis gently tapering backwards to 

 within a short distance of the posterior margin of the pygidium where it is bluntly 

 rounded. Median axis or axial lobe subconical and long with a very gentle rate of 

 tapering, divided by seven transverse shallow distinct furrows into seven rings and one 

 terminal portion which is again divided by shallow transverse furrows into two portions. 

 The pleural lobes, in like manner, are also divided by five shallow slightly impressed 

 furrows into six segments, the second being the broadest. A ntero-lateral margins of limb 

 rounded. 



Lateral or side spines of pygidium slender long curved inward in the free part. 

 The spine springs out from the broadest second segment of the pleural lobe which 

 extends forward at an angle of about 45° with the median line, to about the position 

 between the second and third ring of the axis. 



In the majority of specimens from Chihli, this continuation of the spine and the 

 segmentation of the axis and the pleurse are not readily noted because of the worn or 

 crushed character of the specimen. 



Surface apparently smooth or slightly pustulated. 



This species is characterized by its deep dorsal furrows and frontal furrow which 

 separates the frontal limb and the glabella, short oblong glabella, narrow fixed cheeks, 

 medium eye lobe and the strong lateral spines of the pygidium which spring out from 

 the second segment. It is associated with Kaolishania pustulosa, etc. 



Horizon and Locality: — Upper Cambrian: from Kaohshan limestone of Tai- 

 An, Shantung (Y. C. Sun Coll.), also found in Fengshan limestone of Luan-Hsien, 

 ChihH by Mr. H, C. T'an of the Survey. More than thirty specimens examined. 



Measurements : — 



Cranidium 7a 7b 7c 7d 7e 



Length of cranidium 15.0 mm. 11.0 mm. 9.0 mm. 10.2 mm. 13.2 mm. 

 Width of cranidium at 



the palpebral lobe 13.5 mm. 10.5 mm. 8.1 mm. 10.0 mm. — 



Length of glabella 9.5 mm. 6.7 mm. 5.5 mm. 6.0 mm. 8.0 mm. 

 "Width of glabella opposite 



the palpebral lobe 8.0 mm. 5.7 mm. 5.0 mm. 5.5 mm. 7.0 mm. 



Width of frontal limb 2.3 mm. 1.8 mm. 1.5 mm. 1.8 mm. 2.5 mm. 



