Vol I. 



Sun— Cambrian Faunas of North China 



(iv) 81 



Measure^nents : — 



Cranidinm 



Length of cranidium 



Width of cranidium at palpebral lobe 



Length of glabella 



Width of occipital ring 



Width of frontal limb 



Width of frontal rim 



Pygidium 

 Length 

 Width 



Horizon and Locality: — Middle Cambrian: from the chff limestone of 

 Chengshau, 8 li from Chao-Kou-Chuang, Chihli. Collected by University Excursion 

 (K. S. Hsu #^ge Coll.). 



Genus Dolichometopus Angelin 

 Dolichometopus deois Walcott 



Plate V, Fig. 9. 



1905 Dolichometopus deois Walcott, Proc- u-s. Nat. Mus. Vol. XXIX, p. 94. 



1906 Bathyuricus asiaticns Lorenz, Zeitschr. dentsch geol. Gesellsch., Vol. LVIII, pt. 2 p. 73, PI. V, 

 fig. 1-5. (species characterized and illustrated) 



1900 Amphoton steinmanni Lorenz, idem., Vol., LVIII, pi. 2, p. 75, plate IV, tigs. 15-17. (Species 

 characterized and illustrated) . 



1913 Dolichometopus deois Walcott, Research in China, Vol. Ill, pi. 21, tigs. 13, 13a-d., Plate 22, 

 figures 1, 1 a-h, 2, 2a-b. 



Dr. Walcott gives a full description of this species. 



This species is characterized by its prominent glabella diverging anteriorly Avith 

 three pairs of rather short, very faintly impressed furrows; the presence of a small 

 backward pointing occipital spine; narrow fixed cheeks; long palpebral lobe ; and short 

 and slightly convex frontal limV). 



Dr. Walcott compared this species with D. svecicus Angelin and mentioned that 

 this species differs from the latter in the greater convexity of the glabella, more convex 

 frontal limb, and other minor details of the glabella and the fixed cheeks. 



