l6o RESEARCH IN CHINA. 



Formation and Locality. Middle Cambrian: (C75) Limestone near the base 

 of the Ki-chou formation [Willis and Blackwelder, 1907, p. 143], 4.5 miles (7.2 km.) 

 south of Wu-t'ai-hien, Shan-si, China. 



Collected by Eliot Blackwelder. 



Agraulos vicina Walcott. 



Plate 15, Figure 8. 

 Agraulos vicina WALCOTT, 1906, Proc. U. S. Nat. Mus., vol. xxx, p. 579. (Described as a new species.) 



This species is represented by three specimens of the moderately convex central 

 portions of the cephalon, exclusive of the free cheeks. Glabella conical, convex, and 

 without traces of glabellar furrows; occipital furrow transverse and clearly denned; 

 occipital ring rather strong, transverse, and slightly convex; dorsal furrow rounded, 

 of medium width, and clearly defined at the sides and front of the glabella. 



Fixed cheeks about as wide as the glabella, moderately convex, and sloping for- 

 ward and slightly downward into the frontal limb; palpebral lobes small, situated 

 opposite the central portion of the glabella; palpebral ridges narrow, slightly 

 elevated, and extending from the anterior end of the palpebral lobe to a point corre- 

 sponding to the antero-lateral angle of the glabella; postero-lateral limb short, and 

 marked by a shallow furrow within its posterior margin; frontal limb short, convex 

 in front of the glabella, arching slightly backward on each side to merge into the 

 fixed cheeks; frontal rim broad, slightly convex, and separated by a shallow, slightly 

 defined furrow at the angle formed by the union of the sloping frontal limb with the 

 nearly flat frontal rim. 



Surface roughened as seen by a high magnifying power. The largest specimen 

 in the collection has a length of 3 mm. 



This species is characterized by its narrow, conical glabella, convex frontal 

 limb that merges into the convexity of the fixed cheeks, and the presence of a dis- 

 tinct frontal rim. In the latter respect it approaches Inouyia capax [p. 151] and 

 Agraulos uta [p. 159]. It differs widely from /. capax and less so from A. uta in its 

 narrow, conical glabella and the form of its frontal limb. 



Formation and Locality. Middle Cambrian: (C70) Oolitic limestone about 30 

 feet (9 m.) above the base of the Ki-chou limestone [Willis and Blackwelder, 1907, 

 p. 144 (last list of fossils)], 4 miles (6.4 km.) south-southwest of Tung-yii, Shan-si, 

 China. 



Collected by Eliot Blackwelder. 



Genus PAGODIA Walcott. 

 Pagodia WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 63. (Genus described.) 



This genus is proposed to include a few species from the Upper Cambrian zone 

 which do not appear to be closely related to any described genus. Only the central 

 portions of the cephalon are available for description. 



Glabella oblong, with obscure traces of furrows at the sides. Eyes small, cen- 

 tral, and without trace of palpebral ridge. Facial sutures cut the frontal margin 

 opposite the eye-lobe and the posterior margin within the postero-lateral angles. 



Thorax unknown. 



An associated pygidium has a conical, segmented axis, narrow pleural lobes, and 

 smooth, undefined margin. 



Genotype. Pagodia lotos Walcott. 



The four species of this genus all have a similar type of surface, consisting of 

 shallow punctae of moderate size, with very fine punctae, visible only under a strong 



