50 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



glabella at the base, narrow, and marked by a strong groove within 

 the rounded posterior margin; frontal limb slightly convex and curv- 

 ing downward to the flattened frontal rim; the rim is a little longer 

 than the length of the limb in front of the glabella, and the line of 

 demarcation between the limb and the rim is little more than the 

 angle formed by the union of the nearl}' flat rim with the inclined 

 frontal limb. 



Free cheeks irregularh" triangular; marginal border flattened, 

 strong, and produced behind into a strong, flattened spine; central 

 area slightly convex, and rising rather abruptly to the base of the 63^6 

 lobe; anteriorly the border of the cheeks narrows to a slender point. 



Thorax unknown. 



Associated pj^gidium semicircular in outline, convex; axis convex, 

 about two-thirds the length of the pygidium, and divided by four 

 furrows into four rings and a terminal, longer ring, upon which a 

 slight depression on each side indicates a fifth furrow; the pleural 

 lobes extend out about one-half of the distance nearly flat, and then 

 curve somewhat abruptl}^ downward to a rather broad, flattened mar- 

 gin, into which they merge; the four grooves on the axis and the fifth 

 groove just within the interior margin extend across the pleural lobes, 

 dying out on the flattened margin. Two small nodes occur at the 

 posterior end of the axis, through which a low, broad, rounded ridge 

 extends backward and downward into the flattened margin. 



Surface minutely punctate under a strong lens; fine, radiating, 

 irregular, elevated lines cross the frontal limb from the furrow in 

 front of the glabella and the ocular ridge to the flattened frontal rim, 

 and also from the base of the eye lobe to the margin of the free cheeks. 



This species varies from the described forms in the broad, relatively 

 short glabella and the configuration of the frontal rim and limb. 



Formation and locality. — Middle Cambrian, lower portion of Chang 

 Hsia formation, in a gra}^ fossiliferous limestone; 3.2 miles southwest 

 of Yen Chuang, Hsin Tai, Shangtung, China. 



Collected b}" Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



ANOMOCARE ? DAULIS, new species. 



Of this species the central portions of the head, exclusive of the 

 free cheeks and associated pygidium, are known. Glabella rather 

 strongl}^ convex and faintly marked by three pairs of furrows; it 

 narrows slighth^ toward the rounded front; occipital furrow narrow 

 and curving slightly forward at the center; occipital ring of medium 

 and nearly uniform width from side to side; dorsal furrow shallow 

 and rounded; posteriori}^ the latter separates a narrow, elongated lobe 

 from the side of the glabella, and joins the occipital furrow; the nar 

 row lobe mentioned extends backward to the occipital furrow and 



