54 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



furrow between it and the rather broad frontal rim; the latter in a 

 head 21 mm. in length is 3i mm. lono-; postero-lateral limbs narrow, 

 with a length about equal to the width of the base of the glabella. 

 A strong furrow divides it about midway, parallel to the posterior 

 margin. 



Minute scattered pores are shown on the surface under a strong 

 lens. 



The associated pygidium has a broad planulate margin, convex axis, 

 and slight indications of three or four segments. 



The most nearly related form from China is A. plmium Dames. 

 This species differs from the latter in its narrower fixed cheeks and 

 larger glabella. 



Formation and locality. — Middle Cambrian. Upper portion of 

 Chang Hsia formation in oolitic limestone, about a mile southwest of 

 Yen Chuang, Hsin Tai, Shangtung, China. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



Genus ANOMOCARELLA, new genus. 



Anomocarella is proposed to include three species from the Middle 

 Cambrian of China that differ from Anomocare in the absence of glabel- 

 lar furrows and the presence of a relatively narrow, flattened frontal 

 rim. The sides of the glabella are parallel, palpebral lobes of medium 

 size, and ocular ridges more or less clearly defined. The associated 

 P3^gidium has a narrow conical axis, marked by several transverse 

 furrows which extend out on the pleural lobes and more faintly on 

 the sloping rim. 



Gen otype. — Anomocarella chinensis. 



Tw^o other species are referred to this genus: A. alhion and A. 

 haucis., the latter with some doubt. 



ANOMOCARELLA ALBION, new species. 



This species is represented by three more or less imperfect speci- 

 mens of the head exclusive of the free cheeks. These indicate that 

 the head was of moderate convexity and semicircular in outline. 



Glabella moderately convex, with a gentle and nearly uniform 

 curvature from side to side; on one specimen three pairs of glabellar 

 furrows are very faintly indicated; the sides of the glabella arch 

 slightly inward between the base and the rounded front; occipital 

 furrow shallow, rounded, slightly separating from the glabella a very 

 slightly convex occipital ring; dorsal suture narrow, but distinctly 

 marked. 



Fixed cheeks a little less than one-half the width of the glabella and 

 aearly flat; they merge into the furrow within the palpebral lobe and 



