82 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



AGRAULOS SORGE, new species 



Plate 15, fig. I 

 ■ This species is represented by a single specimen of the central 

 portions of the cephalon. Among the Chinese species referred to 

 Agraulos it may be compared with A. dryas Walcott, from whicli it is 

 readily distinguished by its broader, less convex glabella and its 

 almost smooth, instead of strongly punctate, surface. 



Agraulos sorge appears to have had a strong occipital spine that 

 projected upward and backward from the occipital ring ; only the base 

 of the spine is preserved. 



Surface slightly roughened by a minute, irregular, shallow pitting. 



Formation and locality. — Middle Cambrian: (35n) Fu-ch6u series; 

 limestones near the base of the series just above the white quartzite. 

 collected in a low bluff on the shore of Tschang-hsing-tau island, 

 east of Niang-niang-kung, Liau-tung, Manchuria, China. 



Collected by Eliot Blackwelder. 



Genus LISANIA, new genus 



Cranidium subquadrate in outline, exclusive of postero-lateral 

 Hmbs. Glabella with slightly converging sides, broadly rounded in 

 front and curving gently down to a narrow furrow separating it 

 from the frontal border, without distinctly marked glabellar furrows ; 

 occipital furrow distinct ; occipital segment strong. Fixed cheeks 

 narrow ; palpebral lobe above the eye nearly one-third the length of 

 the cephalon ; palpebral ridge usually defined to the edge of the 

 dorsal furrow beside the glabella. Frontal border slightly convex 

 and separated from the fixed cheeks and glabella by a narrow, shallow 

 but distinct furrow. 



The associated free cheeks have a strong genal spine, and asso- 

 ciated pygidia a strong central axis marked by three or four trans- 

 verse rings and a terminal section. 



Surface smooth or slightly roughened by very fine shallow pits. 



Genotype. — Anomocarella bnra Walcott^ (pi. 15, fig. 2). 



Observations. — This genus is founded to receive four species that 

 do not appear to fall within any described genus. From Pagodia it 

 differs in having a longer eye lobe, narrower free cheeks, flatter 

 frontal margin. Pagodia occurs with the Upper Cambrian faima, 

 Lisania with the Middle Cambrian fauna. From Chnangia (pi. 15, 

 fig"S- 3"6) it differs in its narrower frontal border, narrower fixed 



^Walcott, 1905, Proc. U. S. Nat. Alns., Vol. 29, p. 56. 



