CA MB EI A N FA UNAS OF CHINA— W. 1 L CO TT. 8 1 



lobes is about one-tliird the distance from the posterior to the front 

 marg-in; ocular ridg-c low, broad, and marking- quite distinctly the 

 division between the lateral tixed cheeks and the rather abrupt down- 

 ward slope of the short frontal limb, which merges into the rather 

 broad, flat, frontal rim. 



Surface minutel}' granulose under a strong lens. The largest head 

 in the collection has a length of about 6 mm., exclusive of the occipital 

 spine. This species is distinguished b}^ the strong-, occipital spine, 

 large eye lobes, narrow, tixed cheeks, and the form of the frontal rim. 



J^Vrnudfon iind locality. — Middle Cambrian. At base of Chang Hsia 

 formation, just above the Man To shale. One mile east-southeast of 

 Chang Hsia, Shangtung, China. 



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

 Washington Expedition to China. 



PTYCHOPARIA, species undetermined. 



A single specimen of the central portion of a head that appears to 

 be closely related to P. tenes occurs on the surface of a fragment of 

 limestone. It has a similar slender, long, occipital spine, narrow, tixed 

 cheeks, and flattened frontal rim. It occurs in the upper portion of 

 the Chang Hsia formation, near the middle of the Chang Hsia oolitic 

 limestone, 2 miles south-southeast of Kao Chia Pu, Shangtung, China. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



PTYCHOPARIA TITIANA, new species. 



Head subquadrilateral in outline, exclusive of the free cheeks; 

 moderately convex. Glabella gently convex; broadest at the base, 

 narrowing midway-, and with the sides nearly parallel from the center 

 to the broadly rounded front; glabellar furrows shallow, there are 

 three on each side that penetrate to the central third of the glabella 

 and divide it into two small central lobes, a short terminal lobe, and a 

 posterior lobe that is broad at the sides and narrow toward the cen- 

 tral third; occipital furrow narrow; occipital ring narrow at the sides 

 and gradually thickening toward the center to form the base of a 

 rather strong- spine of unknown length; dorsal furrow shallow, but 

 clearly defined. 



Fixed cheeks of medium width, about two-thirds the width of the 

 glabella; palpebral lobes central and about one-third the length from 

 the posterior to the frontal margins of the head; ocular ridge narrow, 

 clearly defined, it starts near the front line of the glabella and extends 

 obliquely backward and merges into the rim of the palpebral lobe; 

 postero-lateral limbs short and marked by a broad, shallow furrow; 

 frontal limb convex, prominent, about as long- as the fixed cheeks at 

 Proc. N. M. vol. xxix— 05 6 



