NO. 4 CAMBRIAN FAUNAS OF CHINA 9I 



Coosia limbatuin (Angelin) ; it differs in having a slightly convex 

 or rounded frontal limh and proportionately narrower glahella. The 

 pygidium is quite different in outline ; the rounded indented posterior 

 margin of A. liiubotum 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 A. limbatuin. The doublure of the 

 pygidium extends close up to the termination 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 

 diagonally 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 Aiiomocare latelhnbatum Angelin. 



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: (35cj) Fu-ch6u series; 

 about 200 feet (61 m.) 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 J. P. Iddings and Li San. 



Genus ANOMOCARELLA Walcott 



Anomocarclla Walcott, 1905, Proc. U. S. National I\hiseum, Vol. 29, p. 54. 

 (Genus characterized.) 



Anomocarella was proposed to include species from the Middle 

 Cambrian of China, that differ from Anomocare in the absence of 

 glabellar furrows and the presence of a relatively narrow, flattened 

 frontal rim. The sides of the glabella are parallel, palpebral lobes of 

 medium size, and palpebral ridges more or less clearly defined. The 

 associated pygidium has a narrow, conical axis, marked by several 

 transverse furrows which extend out on the pleural lobes and more 

 faintly on the sloping rim. 



Genotype. — Anomocarclla chincnsis Walcott. 



Observations. — The type of this genus has ten segments in tlie 

 thorax with a broad pleural furrow that starts near the inner anterior 

 margin of a segment, broadens very rapidly and extends out beyond 

 the geniculation before gradually narrowing to a point. In Anomo- 

 carclla sniithi (pi. 17, figs. 3, 3a) there are twelve segments in the 

 thorax with the same type of pleural furrow. 



