NO. 1415. CAMBRIAN FAUNAS OF CHINA— WALCOTT. ■ 75 



narrow fixed cheeks and flat frontal border, while having- the same 

 t3'pe of pustulose surface. It occurs in the upper portion of the Chao 

 Mi Tien formation, at Chao Mi Tien, Shangtung, China. Other frag- 

 ments representing- species of this genus are too imperfect for identi- 

 fication or description. 



Genus PTYCHOPARIA Ha-wle and Corda. 

 PTYCHOPARIA ACLIS, new species. 



The slightly convex central portions of the head of this species are 

 preserved. The species is distinguished l)v the breadth of the gla- 

 bella in front and three pairs of short, well-defined furrows that 

 divide the sides of the glabella into four subequal lobes; an occipital 

 spine; and narrow rounded frontal rim, cut around in front nearly to 

 the median line b}" the facial sutures. Ocular ridge well defined. 

 Surface unknown. 



Fonnatlon and locality. — Lower Caml)rian, Man To formation; 

 Chang- Hsia, Shangtung, China. 



Collected by Eliot Black welder, of the Carnegie Institution of 

 Washington Expedition to China. 



PTYCHOPARIA (?) BATIA, new species. 



Head, exclusive of the free cheeks, sub-rhomboidal, moderately 

 convex; glabella truncato-conical; a specimen wntli a length of 11 

 mm. has a width at the base of 11 mm., and at the broadly rounded, 

 almost transverse front of 7 mm. ; very faint traces are shown of a 

 posterior pair of furrows; occipital furrow nearly straight, shallow, 

 rounded, and narrow; occipital ring strong, very slighth' convex, and 

 slightly wilder at the center than at the ends; it is marked at the cen- 

 ter, near the occipital furrow, by a minute node; dorsal furrow dis- 

 tinctly but not deeply marked. 



Fixed cheeks wide and slightly convex, nearly fiat between the gla- 

 bella and palpebral lobe, and curved downward in front to the frontal 

 rim and backward to the furrow within the posterior margin; ocular 

 ridge narrow and low, but distinctlj" shown; posteriorly it passes into 

 the palpebral lobe; palpebral lobe small, and situated a little back of 

 a transverse line drawn through the center of the head; postero-lateral 

 limb large, about as long as the base of the glabella is wide, and 

 marked by a strong fui-row within the elevated posterior margin. The 

 front of the glal)ella and of the fixed cheeks curves down into a shallow 

 furrow, from which the frontal rim rises before curving over to form 

 a thick frontal margin, w^hich is marked by longitudinal raised stria?. 



Surface smooth under a strong lens. The largest of three speci- 

 mens of a head has a length of 20 mm., with a width at the palpebral 

 lobes of 26 mm. 



