NO. 1415. CAMBRIAN FAUNAS OF CHINA— WALCOTT. 45 



Fonnation and locality. — Middle Cambrian. Lower portion of 

 Chang Hsia formation near base of oolitic limestone; 3 miles north- 

 northeast of Hsin Tai Hsien, Shangtung-, China. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



AGRAULOS DIVI, new species. 



This species is represented by portions of the central parts of the 

 head. The glabella is convex, truncato-conical in outline, the width 

 at the base and the length being the same; three pairs of glabellar 

 furrows are very slightly indicated; occipital furrow shallow and 

 broad; occipital ring narrow at the sides, gradually widening toward 

 the center, very slightly convex, and without an occipital spine. 



Fixed cheeks about as wide as the front end of the glabella and 

 nearly flat opposite the palpebral lobes; posteriorly they slope slightly 

 into a strong groove parallel to the posterior margin, and in front the 

 slope is slight down to a broad, slightly indicated, transverse furrow. 



Palpebral lobes unknown, only a trace of the ocular ridge is shown; 

 frontal limb convex, broad, and extending to the frontal margin with- 

 out an}' trace of a line of demarcation between it and the frontal rim; 

 a broad, shallow, transverse furrow extends in front of the glabella 

 and outward across the cheeks below and in front of the ocular ridges; 

 dorsal furrow broad and shallow; surface linely papillose under a 

 strong lens. The largest head of the collection has a length of U mm. 



This species is characterized b}^ its short glabella, broad dorsal fur- 

 row, transverse furrow in front of the glabella, and strong frontal limb. 



Formation and locality. — Middle Cambrian. Either base of Chang 

 Hsia formation or in passage beds between the Man To formation and 

 the Chang Hsia formation; 3.2 miles southwest of Yen Chuang, Hsin 

 Tai, Shangtung, China. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



AGRAULOS DOLON, new species. 



This species is represented b}^ the central portion of the head, exclu- 

 sive of the free cheeks. The glabella and tixed cheeks are convex, 

 somewhat rhomboidal in outline; glabella convex, narrowing slightly 

 toward the broadl}^ rounded frontal margin; posteriorh' it is separated 

 from the occipital ring by a very faint, narrow furrow; there are no 

 traces of glabellar furrows; occipital ring strong, and merged into the 

 broad, subtriangular base of a strong, short spine; dorsal furrows shal- 

 low, but sufficiently strong to mark the line of demarcation between 

 the glabella, fixed cheeks, and frontal limb. 



