588 PROCEEDLXGS OF THE NATIONAL MUSEUM. vol. xxx. 



Surface smooth to the unaided eye. and under a strong lens slightly 

 roughened with what appear to be irregular, ino.sculating, ver}' 

 slightl}' elevated lines, and a few low. scattered tul)ercles. The t3'pe 

 and largest specimen of the head has a length of It nun. 



f)hf<ervati<>ns. — This species at first suggests A(jrtnilos{f) i/ii'Iir{p. 581) 

 owing to the swelling on the frontal limb, the glabella, however, is 

 much broader in proportion to its length, and its furrows are those of 

 Ph/c/ioparitt rather than AgniuJosi. 



ForiiKition and local it ij. — Middle Cambrian, lower portion of oolitic 

 limestone series; 4 miles east of Fang-lan-chon, Shan-si, China. 



Collected by Eliot Blackwelder. 



PTYCHOPARIA LILIA. new species. 



This species is represented by a single fragment of a head, preserv- 

 ing the glabella, the left fixed cheek, and the frontal limb and rim. It 

 is characterized by the convex glabella, marked by three short, very 

 slightly indicated pairs of glabellar furrows, and the strong, rounded 

 frontal rim separated from the glabella by a very short frontal limb. 



The fixed cheeks are moderately convex and marked by faint, 

 ol)li(iuely transverse ocular ridges; palpebral lobes unknown; frontal 

 lind) narrow, "slighth' convex; frontal rim strong, rounded, thickened 

 in front, and separated from the frontal limb by a shallow, narrow 

 furrow. 



Surface formed 1»3' a network of fine, irregular, inosculating, very 

 slightly elevated lines. This surface, when partiall}^ worn, has a punc- 

 tate appearance owing to the shallow places between the lines. The 

 type and only specimen of the head has a length of 5 mm. 



The associated free cheeks have a strong, rather broad border that 

 is continued post(>riorly as a strong and rather long spine. 



Ohserrations. — This species difi'ers from l^ycltoparia {Llodracus) 

 ^oa?^<« Walcott" in having a broader, stronger frontal rim, and shorter 

 frontal limb. 



ForijKitlnii (Old locality. — Middle Cambrian, Ki-chou limestone, in 

 brown gray, partly oolitic bed, 10 feet above red shales, supposed to 

 corr«>spond to the Man-tV) shales of the Shan-tung sections; 4.5 miles 

 south of Wu-t'ai-liien. Shan-si, China. 



Collected by Eliot Blackwelder. 



PTYCHOPARIA NEREIS, new species. 



This form is represented by several heads, exclusive of the free 

 cheeks. Glabella and fixed cheeks are moderately convex; glabella 

 prominent, trunciito-conical, converging very genth' from the base to 

 the slightly rounded front; surface marked by three pairs of short, 

 very slightly impressed furrows, and a ver}- obscure, longitudinal 



«Proc. U. S. Nat. Mus., XXIX, 1905, p. 83. 



