198 RESEARCH IN CHINA. 
Anomocarella bigsbyi (Walcott). 
Plate 21, Figures 3, 3a-0. 
Anomocare bigsbyi WALcoT?, 1906, Proc. U.S. Nat. Mus., vol. xxx, p. 581. (Described and discussed 
as a new species essentially as below.) 
Of this species only the central portions of the cephalon, exclusive of the free 
cheeks, are known. Glabella moderately convex; a glabella 9 mm. in length has a 
width of 9 mm. at the base and 6 mm. in front; front rounded from the anterior side 
of the palpebral ridges; surface marked by a pair of faintly impressed posterior 
furrows that extend obliquely backward from the dorsal furrow toward the center; 
a second pair of furrows is indicated by a smooth place on the surface; occipital 
furrow very shallow at the center, broader and slightly deeper toward the sides, with 
a shallow pit near the dorsal furrow; occipital ring of medium width, very slightly 
convex; dorsal furrow shallow, but clearly indicated at the sides and front of the 
glabella. 
Fixed cheeks narrow, flat opposite the palpebral lobes; they curve gently down 
toward the posterior furrow and more abruptly in front; palpebral lobes small, less 
than one-fifth the length of the cephalon; the marginal rim is prominent, and passes 
obliquely into the low, broad palpebral ridge which crosses the cheek obliquely to 
the antero-lateral angle of the glabella; frontal limb slightly concave, passing with 
very slight interruption into the flattened rim, the line of demarcation between the 
limb and rim being little more than the angle formed by the union of the sloping 
limb with the more nearly horizontal rim. 
Surface minutely granular, the granules being irregularly distributed, and rising 
abruptly from the general surface. A cephalon of 15 mm. in length has the same 
width at the palpebral lobes. 
This species may be compared with Anomocarella temenus [plate 20, fig. 7], 
from which it differs in its broader glabella and less distinctly marked line between 
the frontal limb and rim. The small palpebral lobe is like that of Anomocarella 
bergtont [plate 19, fig. 13]. 
Formation and Locality.—Middle Cambrian: (C71) Massive cliff-making lime- 
stone in the central portion of the Ki-chéu formation [Willis and Blackwelder, 1907, 
pp. 139 and 145 (second list of fossils)|, 4 miles (6.4 km.) southwest of Tung-yii, 
Shan-si, China. 
Collected by Bailey Willis and Eliot Blackwelder. 
Anomocarella biston (Walcott). 
Plate 21, Figure 2. 
Anomocare biston WaLcort, 1905, Proc. U.S. Nat. Mus., vol. xxrx, p.49. (Described as a new species 
essentially as below.) 
This species is represented by some fragments of the central portion of the 
cephalon. Glabella moderately convex, subquadrilateral in outline, narrowing 
slightly toward the broadly rounded, almost transverse front; surface marked by 
three pairs of slightly impressed, short furrows; occipital furrow rounded, distinctly 
marked, transverse; occipital ring narrow at the sides, broadening toward the center 
to form the base of a moderately strong spine; dorsal furrow narrow, rounded, and 
distinct. 
Fixed cheeks narrow, scarcely more than a ridge between the dorsal furrow 
and the palpebral lobe; palpebral lobe about one-third the length of the cephalon, 
separated from the fixed cheek by a narrow, deep groove; palpebral ridge short, 
distinct, and merging into the rim of the palpebral lobe; postero-lateral limb about 
