NO. 1415. CAMBRIAN FAUNAS OF CHINA— WALVOTT. 95 



faintly impressed furrows; the sides of the i>labella are sul>-parallel 

 for a short distance near the base and then are g-ently inclined outward 

 to the rounded front margin; occipital furrow shallow, I'ounded, and 

 merging' into the strong occipital ring, the latter is narrow at the 

 sides broadening rather rapidly to the ))ase of a small, backward slop- 

 ing occipital spine; the front the glabella curves rather abruptly down- 

 ward, which gives the anterior portion a convex appearance; dorsul 

 furrow shallow^ and distinctly defined at the sides of the glabella. 



Fixed cheeks narrow and slightly convex a*nd sloping posteriorly 

 downward to an elongate postero- lateral limb; in front of the pal- 

 pebral lobe the cheeks slope abrui)tly down to the frontal liml); 

 palpebral lobes a little longer than one-third the length of the head. 

 There does not appear to be any detinite ocular ridge. The elevated 

 rim of the palpebral lobe approaches closely to the dorsal furrow, 

 where it is merged into the downward slope of the fixed cheek; 

 frontal limb short and slightlv convex. 



Surface apparently smooth under a strong lens. 



On the anterior portion of a cast of the glabella there is indicated 

 a very short fourth furrow close to the antero-lateral angle; the same 

 specimen also shows what is the frontal limb in other heads divided 

 into a short frontal liml) and a narrow, slightly upturned rim. The 

 largest head in the collection has a length of 17 mm. 



This species differs from the type of the genus D. Kveclcus Angelin in 

 the greater convexity of the glabella, more convex frontal limb, and 

 other minor details of the glabella and fixed cheeks; from i>. (l/.ree it 

 differs in the greater expansion of the glaf)ella in front, and from JJ. 

 dereeto in the configuration of the frontal limb. 



Formation and loecdity. — Middle C^imbrian. Near the base of the 

 Chang Hsia formation in a gray limestone, which carries great num- 

 bers of Agnostus chuien.'<is Dames. Three miles southwest of Yen 

 Chuang and 3 miles west of Kao Chia Pu, Hsin Tai, Shangtung, C^hina. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



DOLICHOMETOPUS DERCETO, new species. 



This species is known only by the central portions of the head, 

 exclusive of the free cheeks. Glabella moderately convex and 

 expanding slightl}^ in width from the base to the rounded front; the 

 surface is marked by two pairs of rather strong, short furrows oppo- 

 site the palpebral lobe; occipital ring strong and rather deep; occipi- 

 tal ring narrow at the sides, rising and widening to form the base 

 for a small, sharp, occipital spine; dorsal furrow strong on the sides 

 of the glabella. 



Fixed cheeks narrow, convex; palpebral lobe narrow, elongate, 

 almost touching the dorsal furrow in front; postero-lateral limb of 



