84 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



The associated pygidium is large, with a strong axis, broad pleural 

 lobes, and few indications of segments. 



The general form of the glabella is much like that of some species 

 of Anomocare (pi. 17) but the frontal limb is quite difit'erent. The 

 latter suggests Pagodia lotos Walcott but the frontal limb of the latter 

 is absorbed by the rounded frontal rim. In Chiiungia the frontal 

 limb and rim meet to form an angle and the rim does not rise above 

 the upward sloping surface of the frontal limb. 



Genotype. — Chuangia hatia Walcott^ (pi. 15, figs. 3, 3a). Three 

 other species are known from the Upper Cambrian formations of 

 China: Chuangia nitida, C. nais, and C. fragmcnta. 



CHUANGIA FRAGMENTA, new species 

 Plate 15, fig. 4 



Only a fragment of the cephalon of this species is known. This 

 suggests the glabella of Chuangia hatia, but the narrow fixed cheeks 

 serve to distinguish it. The surface is smooth to the unaided eye, and 

 slightly pitted or punctate under a strong lens. The fragment of the 

 cephalon has a length of 16 mm. 



Formation and locality. — Upper Cambrian: (C61) a dense black 

 limestone in the uppermost limestone member of the Kiu-lung group, 

 3 miles (4.8 km.) southwest of Yen-chuang, Sin-t'ai District, Shan- 

 tung, China. 



Collected by Li San. 



CHUANGIA NAIS, new species 



Plate 15, fig. 5 



This is a large species that is represented by a part of the central 

 portions of the cephalon. Glabella subquadrangular, moderately 

 convex, narrowing slightly toward its broadly rounded front ; with- 

 out glabellar furrows so far as can be determined ; occipital furrow 

 shallow, rather broad, and nearly transverse ; occipital ring gently 

 convex, arid slightly wider toward the center ; dorsal furrow shallow 

 and clearly defined. 



Fixed cheeks about two-thirds the width of the glabella, nearly 

 liat between the glabella and the palpebral lobes, and sloping down- 

 ward in front to the frontal rim, and back to the posterior furrow ; 



' Walcott, 1905, Proc. U. S. Nat. Mus., Vol. 29, p. 75. 



