192 RESEARCH IN CHINA. 
The pygidium is quite different in outline; the rounded indented posterior margin 
of C. (2) limbata [plate 21, fig. 12a] is represented by a deep notch that gives a bilobed 
appearance to the very broad margin; the axial lobe is also longer and broader than 
that of C. (?) limbata. The doublure of the pygidium extends close up to the termina- 
tion of the furrows of the pleural lobe. The pleural lobes of the thoracic segments 
have a narrow, strong furrow that extends from the inner, anterior margin diagon- 
ally across nearly to the posterior margin of the backward curving, slightly falcate 
ends of the segment. 
The stratigraphic position of this species is about 250 feet (79 m.) above the 
zone of Anomocare latelimbatum Dames. 
The specific name is given in recognition of the excellent work done by Li San, 
who assisted Professors Willis and Iddings in their collecting. 
Formation and Locality—Middle Cambrian: (35q) Fu-chéu series, about 200 
feet (61 m.) above the white quartzite [see Blackwelder, 1907), p. 92, for general 
stratigraphic relations]; collected in a low bluff on the shore of Tschang-hsing-tau 
Island, east of Niang-niang-kung, Liau-tung, Manchuria, China. 
Collected by J. P. Iddings and Li San. 
Anomocare megalurus (Dames). 
Plate 18, Figures 9, 9a-f. 
Liostracus megalurus DAMES, 1883, China, Richthofen, vol. Iv, p. 20, plate 1, figs. 7, 8, 10. (Species 
described, discussed, and illustrated.) 
Ptychoparia (Liostracus) megalurus (Dames), WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxrx, p. 9. 
(Listed under subgenus of Ptychoparia.) 
Numerous fragments of this species occur in a dark shaly limestone in associa- 
tion with Acrotreta shantungensis Walcott and Obolus chinensis (Walcott). A com- 
parison of photographs of the type specimens described by Dames with the originals 
of the figures on plate 18 leads me to place them under the same species. Doctor 
Dames found fragments of Dorypyge richthofent Dames associated with this species 
at Wu-lo-pu. Prof. J. P. Iddings found fragments of the cephalon in the same 
association on the island of Tschang-hsing-tau, Liau-tung. 
Formation and Locality —Upper Cambrian: (C37) Upper part of the Ki-chéu 
limestone [the fossils from this locality are not listed, but the presence of Cambrian 
strata at the locality is mentioned by Willis and Blackwelder, 1907, p. 146], in 
dense black limestone nodules in green-gray shales 10 feet (3 m.) below the base of 
the cliff limestone, 8 miles (12.8 km.) south of Ting-hiang-hién, Shan-si, China. 
Collected by Eliot Blackwelder. 
Also from Locality 85n, Middle Cambrian, Fu-chéu series, limestone near the 
base of the series just above the white quartzite [see Blackwelder, 1907), p. 92, for 
general section giving stratigraphic relations]; collected in a low bluff on the shore 
of T'schang-hsing-tau Island, east of Niang-niang-kung, Liau-tung, Manchuria, China. 
Collected by J. P. Iddings and Li San. 
The type specimens described by Doctor Dames were found in a light gray 
limestone at the foot of a limestone cliff at Wu-lo-pu, Province of Liau-tung, south- 
east of Mukden, Manchuria, China. 
Anomocare minus Dames. 
Plate 19, Figures 1, ra—d. 
Anomocare minus DAMES, 1883, China, Richthofen, vol. rv, p. 15, pl. 1, fig. 24. (Species described, 
discussed, and illustrated.) 
A comparison of our specimens with a photograph of one of the type specimens 
described by Dames indicates that as far as the cranidium can serve for identifica- 
tion, the specimens from Yen-chuang are specifically similar to those from Ta-ling. 
