NO. 1415. CAMBRIAN FA UNAS OF CHINA— WALCOTT. 43 



lobes is 5 mm. This species is clearly separated from other forms by 

 its strongly detined glabella and prominent limb, which is formed by 

 the union of the true limb and the frontal margin. 



Forination and locality. — Lower portion of Chang Hsia formation 

 near base of oolitic limestone. Yen Chuang, Hsin Tai, Shangtung, 

 China. 



Collected by Eliot Blackw elder, of the Carnegie Institution of 

 Washington Expedition to China. 



AGRAULOS ABROTA, new species. 



This species is represented b\^ several small heads exclusive of the 

 fixed cheeks. It is closel}^ related to Agraulo.s dryas but differs from 

 it in the greater width, stronger convexity of the glabella and greater 

 downward slope of the frontal margin. The surface is also more 

 minutely punctate than that of Ar/raulos dryas. Largest specimen is 

 a little less than 3 mm. in length. 



FoTination and locality. — Middle Cambrian. Lower portion of 

 Chang Hsia limestone. In gray oolitic limestone, Chang Hsia, Shang- 

 tung, China. 



Collected by Eliot Blackwelder, Carnegie Institution of Washington 

 Expedition to China. 



AGRAULOS ACALLE, new species. 



Central portions of head, exclusive of free cheeks, moderately con- 

 vex. Glabella truncato-conical, convex, short, scared}^ more than 

 one-half the length of the head, and without traces of furrows; occipi- 

 tal furrow not much more than a depressed line; occipital ring broad, 

 almost subtriangular in outline, and rising at the center to a small 

 node. 



Fixed cheeks about as wide as the glabella, strongly convex, and 

 merging into a frontal limb of about equal width and convexity; pal- 

 pebral lobe minute, situated o{)posite the central portions of the gla- 

 bella; postero-lateral limbs short and marked by a narrow furrow 

 parallel to the margin. 



Surface smooth under a strong lens. The heads vary in length from 

 3 to 4 mm. A specimen 3 mm. in length has a width of 2.5 mm. at 

 the palpebral lobes. 



Formation and locality. — Middle Cambrian. In gray crystalline 

 limestone, 3.25 miles southwest of Ten Chuang, Hsin Tai, Shangtung, 

 Cyhina. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



